One Downipipe Hotter Than Other
#1
Posted 24 January 2011 - 01:06 pm
When I was running the engine up to temperature after the coolant change - at about 2000 rpm till the fan cut in - I noticed that the rh downpipe was glowing red. the lh downpipe was still hot, but not glowing to the same extent. I know the exhaust gets hot - but I was surprised to see one pipe this hot.
Is this normal ?
The bike runs OK, is on standard exhausts.
I did search through the forum for similar results - but couldn't find anything similar, so now I'm wondering if I've done something wrong
#2
Posted 24 January 2011 - 01:32 pm
02 TDM 900, Silver. 85k miles
Givi Box + panniers, Baglux Cover, Baglux Bag, R&Gs, Remus Cans, PC3, Air Box Mod, DL handguards, Hel Hoses, Heated Grips, LED Lights on handguards, Scottoiler, Scorpion Rad guard, Top Sellerie Seat, Gear Indicator, Stebel Nautilus, Wilbers Rear Shock, MCT reworked forks.
#3
Posted 24 January 2011 - 01:59 pm
Try searching for 'glowing' Loadsa stuff.
Mk2a 2000 in Silver. Top end Refurb @ 41100 miles, Scottoiler, Renthal Road High Bars, Up & Back Bar Risers, Bellypan, DL650 Handguards, Capt. Picard Bar Ends, House of Henty SS Wheel spacers, New Seat Cover Fitted. 58 MPG !! Now owned by chrisbee ! Studley's mk2a Bloggerydoodaah ! Photos of my first MK1 Photos of my MK2a TPLQHCSRSFC No. 1 Fan
#4
Posted 24 January 2011 - 02:40 pm
Thanks for the search item - that does match what I'm seeing.
It's done about 24k miles so I'm hoping it's not the valves. ( I can't be bothered to take a look, I'd probably drop half my toolbox into the engine)
I did like the comment saying that it be because it's a 270 degree crank (crossplane?) - I did wonder if that might be so. The glow disappears quickly at idle.
I have seen turbo engines with whole manifolds etc glowing brightly - but they were producing serious power at the time.
The temperature guage behaves normally
#5
Posted 24 January 2011 - 03:06 pm
Saw the same on my bike, but not just one, they where both glowing like chrismas lights. Bike behaves normally and every thing seems ok.
What can it be ?
Tdm 900 and Labrador.
Can it get any better.
Dont think so.
#6
Posted 24 January 2011 - 03:51 pm
#7
Posted 24 January 2011 - 04:06 pm
I've yet to run the diagnostics for this service, so I'll have a play and see if I can tune bu colour !
Thanks fopr the update.
#8
Posted 24 January 2011 - 05:35 pm
Saw the same on my bike, but not just one, they where both glowing like chrismas lights. Bike behaves normally and every thing seems ok.
What can it be ?
It's cos the exhaust is leaving the ports at around 1000 deg. C at 2000 rpm - kinda makes the pipes colourful as there's no wind to cool them......................
The left one has the ginormous oxygen sensor in it acting as a backpressure - wondering if that's why they're different - or the mixture is slightly different - wouldn't worry about it if it's going ok
1967 Yamaha TD1C 250, 2014 Kawasaki W800, 2011 Aprilia Tuono 1000 V4, 2020 Yamaha XSR900
"At the cutting edge of technophobia"
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