Can it be done on a Mk1? Lots of life left in my Mk1 but I want to look towards the future.
TDM850 engine modifications
Started by
Guest_Emmett_*
, Nov 29 2006 09:33 pm
71 replies to this topic
#61
tdm850rider
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- Member
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- 6,103 posts
Carpe Citizen
- Location:Pittsburgh, Pennsylvania USA
- TDM model: 1992
Posted 17 January 2007 - 11:27 pm
For those of us in the States who were screwed out of any TDM from 1994 on......
Can it be done on a Mk1? Lots of life left in my Mk1 but I want to look towards the future.
Can it be done on a Mk1? Lots of life left in my Mk1 but I want to look towards the future.
Always tell the truth, it will gratify some of the people and astonish the rest. (Mark Twain)
£
Stebel Nautilus air-horn, Corbin seat, MRA Touring screen, single Delkevic silencer.
"I see by your outfit that you are a spaceman"(MkI (3VD) TDM Review)
Hints for using Carpe-TDM. (photo's, links, etc).
#62
wicklamulla
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- Supporting Member(thanks)
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- 12,211 posts
is it Jizzy Rascal time yet.....?
- Location:Parish of Cruwys (pronounced 'Cruise' just loike Tom) Morchard, Mid Devon.
- TDM model: 1999
Posted 18 January 2007 - 01:20 am
QUOTE(tdm850rider @ Wed 17th Jan 2007, 11:12 PM) <{POST_SNAPBACK}>
For those of us in the States who were screwed out of any TDM from 1994 on......
Can it be done on a Mk1? Lots of life left in my Mk1 but I want to look towards the future.
yes Tom it can be done to yer MKI, even XTZ 750's can have it done apparently.
Can it be done on a Mk1? Lots of life left in my Mk1 but I want to look towards the future.
spyball alarm/immob, bluespot brake calipers and Stainless hoses, Fournales air adjustable shock with Remote Resevoir, forks raised 10mm thru yokes, racetech linear fork springs in 15 wt oil, Kappa wingrack/luggage, heated grips, Kedo handguards, dual heat controller to power heated jacket liner and or pants!!, Stebel 136DB horn, K&N air filter, colour matched Baglux tank cover (magnetic tank bag modified to fit cover), osram +50% headloight bulbs, headlight protector,"NitramSpecial" parking loight, tail light indicators all running on LED's & incorporate "Lite Buddies", MK7 Scottoiler fitted, taller screen, 2-2 stainless steel CCC's, Devil stainless down pipes. MKI Renntec engine crash bars & sump guard.
engine changed july 2007 on a dyno run it made 79.1BHP / Torque 59.9Had a brief flirtation with a 1999 MKIIa but it blew an exaust valve on the M5 so was sold on to be repaired.
I loike tay and hang sangwiches !
www.kenhogantreeservices.co.uk
http://s33.photobuck...77/wickla/?sc=6
http://reg.imageshack.us/v_images.php
#63
rick900
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- Members
- 1 posts
arrived on last train
- TDM model: 2001
Posted 08 February 2007 - 07:20 pm
QUOTE(wicklamulla @ Thu 18th Jan 2007, 03:05 AM) <{POST_SNAPBACK}>
yes Tom it can be done to yer MKI, even XTZ 750's can have it done apparently.
Hi Guys,
Rick here, yep a 750 plus the 900 barrels give 850cc approx.
It was nice to see all my work put to good use.
I was going to increase the comp ratio some more, as it ran on cheap petrol with no pinking, and i had just put some V2 cams in.
I am only visiting as a nostalgia trip , as the final development work never got done as some thieving scum nicked the bike last May.
I couldn't go through all the work again, so got a KTM 950 which is very.nice, but I would still swop it for my nicked bike, it was so nicely made for me.
Will keep poppping in now and again
#64
Johnfrmcal
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- Members
- 18 posts
discovering Carpe
- TDM model: 1992
Posted 09 February 2007 - 10:07 pm
QUOTE(rick900 @ Thu 8th Feb 2007, 11:05 AM) <{POST_SNAPBACK}>
Hi Guys,
Rick here, yep a 750 plus the 900 barrels give 850cc approx.
It was nice to see all my work put to good use.
I was going to increase the comp ratio some more, as it ran on cheap petrol with no pinking, and i had just put some V2 cams in.
I am only visiting as a nostalgia trip , as the final development work never got done as some thieving scum nicked the bike last May.
I couldn't go through all the work again, so got a KTM 950 which is very.nice, but I would still swop it for my nicked bike, it was so nicely made for me.
Will keep poppping in now and again
Rick here, yep a 750 plus the 900 barrels give 850cc approx.
It was nice to see all my work put to good use.
I was going to increase the comp ratio some more, as it ran on cheap petrol with no pinking, and i had just put some V2 cams in.
I am only visiting as a nostalgia trip , as the final development work never got done as some thieving scum nicked the bike last May.
I couldn't go through all the work again, so got a KTM 950 which is very.nice, but I would still swop it for my nicked bike, it was so nicely made for me.
Will keep poppping in now and again
So were all the details and measurements ever posted up anywhere? I want to start collecting the parts for one of my bikes. As was mentioned earlier, we don't have any options in the US but to keep our old ones running. I've ridden the WeeStrom, the Tiger, the Gran Canyon, Multistrada, etc...all the adventure bikes available to us, and even though many of them are more "modern" and have more conveniences, none of them are as fun to me as my TDM...
#65
wicklamulla
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- Supporting Member(thanks)
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- 12,211 posts
is it Jizzy Rascal time yet.....?
- Location:Parish of Cruwys (pronounced 'Cruise' just loike Tom) Morchard, Mid Devon.
- TDM model: 1999
Posted 10 February 2007 - 02:16 am
i wonder why it will give 850cc approx and not 900cc ???? shorter stroke or ???
spyball alarm/immob, bluespot brake calipers and Stainless hoses, Fournales air adjustable shock with Remote Resevoir, forks raised 10mm thru yokes, racetech linear fork springs in 15 wt oil, Kappa wingrack/luggage, heated grips, Kedo handguards, dual heat controller to power heated jacket liner and or pants!!, Stebel 136DB horn, K&N air filter, colour matched Baglux tank cover (magnetic tank bag modified to fit cover), osram +50% headloight bulbs, headlight protector,"NitramSpecial" parking loight, tail light indicators all running on LED's & incorporate "Lite Buddies", MK7 Scottoiler fitted, taller screen, 2-2 stainless steel CCC's, Devil stainless down pipes. MKI Renntec engine crash bars & sump guard.
engine changed july 2007 on a dyno run it made 79.1BHP / Torque 59.9Had a brief flirtation with a 1999 MKIIa but it blew an exaust valve on the M5 so was sold on to be repaired.
I loike tay and hang sangwiches !
www.kenhogantreeservices.co.uk
http://s33.photobuck...77/wickla/?sc=6
http://reg.imageshack.us/v_images.php
#66
dapleb
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- Root Admin(A)
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- 18,357 posts
Monkey Boy
- Location:The home of morris dancin
- TDM model: 1990
Posted 10 February 2007 - 09:11 am
"Whats up", "Piston Broke", "Yeah me too...hic"
If you want to mark your location on the Carpe map: http://www.carpe-tdm...opic.php?t=5117
Doin valve clearances? Use dappers valve shim exchange program and the job will be carroty - Free (other than you postin me yer shims) for sporting members.
Active member of TPLQHCSRSFC and TSRMCMAS (even though a year off) and avid fan of PM not sent.
If you want to mark your location on the Carpe map: http://www.carpe-tdm...opic.php?t=5117
Doin valve clearances? Use dappers valve shim exchange program and the job will be carroty - Free (other than you postin me yer shims) for sporting members.
Active member of TPLQHCSRSFC and TSRMCMAS (even though a year off) and avid fan of PM not sent.
#67
wicklamulla
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- Supporting Member(thanks)
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- 12,211 posts
is it Jizzy Rascal time yet.....?
- Location:Parish of Cruwys (pronounced 'Cruise' just loike Tom) Morchard, Mid Devon.
- TDM model: 1999
Posted 19 February 2007 - 09:46 pm
QUOTE(rick900 @ Thu 8th Feb 2007, 07:05 PM) <{POST_SNAPBACK}>
Hi Guys,
Rick here, yep a 750 plus the 900 barrels give 850cc approx.
It was nice to see all my work put to good use.
I was going to increase the comp ratio some more, as it ran on cheap petrol with no pinking, and i had just put some V2 cams in.
I am only visiting as a nostalgia trip , as the final development work never got done as some thieving scum nicked the bike last May.
I couldn't go through all the work again, so got a KTM 950 which is very.nice, but I would still swop it for my nicked bike, it was so nicely made for me.
Will keep poppping in now and again
Rick here, yep a 750 plus the 900 barrels give 850cc approx.
It was nice to see all my work put to good use.
I was going to increase the comp ratio some more, as it ran on cheap petrol with no pinking, and i had just put some V2 cams in.
I am only visiting as a nostalgia trip , as the final development work never got done as some thieving scum nicked the bike last May.
I couldn't go through all the work again, so got a KTM 950 which is very.nice, but I would still swop it for my nicked bike, it was so nicely made for me.
Will keep poppping in now and again
Rick didya ever get either of those XTZ's back ?? got any pics of yer former beauties fer us to ogle ??? regards WiCkY
spyball alarm/immob, bluespot brake calipers and Stainless hoses, Fournales air adjustable shock with Remote Resevoir, forks raised 10mm thru yokes, racetech linear fork springs in 15 wt oil, Kappa wingrack/luggage, heated grips, Kedo handguards, dual heat controller to power heated jacket liner and or pants!!, Stebel 136DB horn, K&N air filter, colour matched Baglux tank cover (magnetic tank bag modified to fit cover), osram +50% headloight bulbs, headlight protector,"NitramSpecial" parking loight, tail light indicators all running on LED's & incorporate "Lite Buddies", MK7 Scottoiler fitted, taller screen, 2-2 stainless steel CCC's, Devil stainless down pipes. MKI Renntec engine crash bars & sump guard.
engine changed july 2007 on a dyno run it made 79.1BHP / Torque 59.9Had a brief flirtation with a 1999 MKIIa but it blew an exaust valve on the M5 so was sold on to be repaired.
I loike tay and hang sangwiches !
www.kenhogantreeservices.co.uk
http://s33.photobuck...77/wickla/?sc=6
http://reg.imageshack.us/v_images.php
#68
jht
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- Member
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- 1,769 posts
has been here 4ever
- Location:surrey/hants border
- TDM model: 1996
Posted 19 February 2007 - 10:51 pm
Ya could oggle this..... 
yamaha_trx_850_eric_img01.jpg 59.51KB
44 downloads
tho Iain't sure about the exhaust pipe routing...
yamaha_trx_850_eric_img01.jpg 59.51KB
44 downloadstho Iain't sure about the exhaust pipe routing...
Edited by jht, 19 February 2007 - 10:53 pm.
Done: Homo sap navigation/ twisty thing on bars to make it go vroom/ grabby thing to make it stop (in front of twisty thing)/ 'leccy things front and rear to make it glow at night/ Sucky + drippy oiler thing to keep chains moist (!!) / Laser Pro Stock Race pipes / bleeding ear drums (see previous mod)
To do: Educate homo sap nav system to operate twisty + grabby things/ get ear plugs
All Trashed Now... Pants... its a Cat B Mwahahaha it lives again!!
Remember every driver is a deaf myoptic twat who is out to kill you, ALWAYS assume they are going to do THE most f*cking DUMBASS, STUPID manouver possible, at the worst possible moment; get past, and get past quick
To do: Educate homo sap nav system to operate twisty + grabby things/ get ear plugs
Remember every driver is a deaf myoptic twat who is out to kill you, ALWAYS assume they are going to do THE most f*cking DUMBASS, STUPID manouver possible, at the worst possible moment; get past, and get past quick
#69
wicklamulla
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- Supporting Member(thanks)
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- 12,211 posts
is it Jizzy Rascal time yet.....?
- Location:Parish of Cruwys (pronounced 'Cruise' just loike Tom) Morchard, Mid Devon.
- TDM model: 1999
Posted 20 February 2007 - 09:49 am
OMG thats beautiful !!!!!!!!!!! wonder if it burns oil..........
spyball alarm/immob, bluespot brake calipers and Stainless hoses, Fournales air adjustable shock with Remote Resevoir, forks raised 10mm thru yokes, racetech linear fork springs in 15 wt oil, Kappa wingrack/luggage, heated grips, Kedo handguards, dual heat controller to power heated jacket liner and or pants!!, Stebel 136DB horn, K&N air filter, colour matched Baglux tank cover (magnetic tank bag modified to fit cover), osram +50% headloight bulbs, headlight protector,"NitramSpecial" parking loight, tail light indicators all running on LED's & incorporate "Lite Buddies", MK7 Scottoiler fitted, taller screen, 2-2 stainless steel CCC's, Devil stainless down pipes. MKI Renntec engine crash bars & sump guard.
engine changed july 2007 on a dyno run it made 79.1BHP / Torque 59.9Had a brief flirtation with a 1999 MKIIa but it blew an exaust valve on the M5 so was sold on to be repaired.
I loike tay and hang sangwiches !
www.kenhogantreeservices.co.uk
http://s33.photobuck...77/wickla/?sc=6
http://reg.imageshack.us/v_images.php
#70
anda3243
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- Member
- 89 posts
really likes Carpe
- Location:Stockholm
- TDM model: 1999
Posted 28 May 2011 - 09:44 am
QUOTE(Emmett @ Wed 29th Nov 2006, 11:33 PM) <{POST_SNAPBACK}>
So.....................................................my '98 model burns some oil, more oil than petrol, well not quite, but enough to pish me right off. I also wouldn't mind a bit more power, without sacrificing reliability. The general consensus is that the steel liners matched with ally pistons cause the excessive oil consumption, and we all know theres no substitute for cubes, soooooo, I (with the assistance of a Yamaha mechanic friend, that is a friend who is a Yamaha mechanic and not a Yamaha mechanics friend) am in the process of putting TDM900 pistons and barrels onto my 850.
So far the engine is out, the head and barrels are off and the con rods are out. The 900 barrels are definitely a straight fit, but the900 has lower compression, so to offset that I (we) have decided to skim 0.4ml off the head. Which according to Jimmys(my mechanic friend) calculations should raise compression to about 10.8-1. The only other complication is the con rod small end eye needs to be 1mm larger diameter, which could be reamed out, but I have 900 con rods which will go straight in, so I'm gonna use them.
The compression issue has been raised before on a TRX owners site, and rick, who did the conversion, decided to skim the top of the pistons and the bottom of the barrels to remove the concave surface of the piston, and increase the compression. We have decided to skim the head, as it is easier than skimming the bottom of the barrels, the liners protrude so machining around them could be costly. I also have a spare head, so if it doesn't work out, I can undo anything and use ricks method.
So far I havent machined or skimmed anything, but all the bits are apart and the measurements are done, so if anyone knows of any reason these two things shouldn't be together, let them speak now, or forever hold their peace(or piece, I'm not sure)
I will keep you updated, but the whole job should be finished by next week..................I hope.
Sorry, you have to sign into the TRX forum to view it, but it's well worth a read, so sign up.
So far the engine is out, the head and barrels are off and the con rods are out. The 900 barrels are definitely a straight fit, but the900 has lower compression, so to offset that I (we) have decided to skim 0.4ml off the head. Which according to Jimmys(my mechanic friend) calculations should raise compression to about 10.8-1. The only other complication is the con rod small end eye needs to be 1mm larger diameter, which could be reamed out, but I have 900 con rods which will go straight in, so I'm gonna use them.
The compression issue has been raised before on a TRX owners site, and rick, who did the conversion, decided to skim the top of the pistons and the bottom of the barrels to remove the concave surface of the piston, and increase the compression. We have decided to skim the head, as it is easier than skimming the bottom of the barrels, the liners protrude so machining around them could be costly. I also have a spare head, so if it doesn't work out, I can undo anything and use ricks method.
So far I havent machined or skimmed anything, but all the bits are apart and the measurements are done, so if anyone knows of any reason these two things shouldn't be together, let them speak now, or forever hold their peace(or piece, I'm not sure)
I will keep you updated, but the whole job should be finished by next week..................I hope.
Sorry, you have to sign into the TRX forum to view it, but it's well worth a read, so sign up.
So you used the 900 barrels with the 850 cylinder head and 850 crankcase/gearbox? What camchain tensioners/sliders did you use?
#71
dandywarhol
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- Supporting Member(thanks)
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Carpe Citizen
- Location:Edinburgh, Scotland
- TDM model: 2003
Posted 28 May 2011 - 12:53 pm
QUOTE(anda3243 @ Sat 28th May 2011, 10:44 AM) <{POST_SNAPBACK}>
So you used the 900 barrels with the 850 cylinder head and 850 crankcase/gearbox? What camchain tensioners/sliders did you use?
Emmett's rarely on the site these days - he used the 900 tensioner and guides from memory.
1967 Yamaha TD1C 250, 2014 Kawasaki W800, 2011 Aprilia Tuono 1000 V4, 2020 Yamaha XSR900
"At the cutting edge of technophobia" 
#72
anda3243
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- Member
- 89 posts
really likes Carpe
- Location:Stockholm
- TDM model: 1999
Posted 29 May 2011 - 08:32 pm
QUOTE(dandywarhol @ Sat 28th May 2011, 02:53 PM) <{POST_SNAPBACK}>
Emmett's rarely on the site these days - he used the 900 tensioner and guides from memory.
ok, thanks
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