Well, as your EXH valves should be 0.011 then what is hapening is that they are actually warming up and staying open!
This means that fuel is being burnt in the headder pipe, making it glow......
As mentioned will stuff your EXH valves in no time.
If anything if you ride it hard then the clearence should be BIGGER than 0.011, not smaller.
Take it to someone who knows what they're actually doing. The internet can only do so much.
Right , rang the honda shop from were i got the bike from aparenlty they are ment to do that, but im not convinced as it is a hard to start.
its going into the shop on monday.
Retarded timing will do it easily, check it.
Winding up drongos, foil hat wearers and over sensitive KBers for over 14,000 posts...........
" Life is not a rehearsal, it's as happy or miserable as you want to make it"
I want to run red-hot exhaust pipes. Please find out what's the problem then tell us all how to emulate it. That is all.
Top end rebuild another MX 250 bites the dust .
Here are a couple of thread replies from the aprilia forum about the glowing headers.
My sxv 5.5 does it when first started if run on 1/3 throttle for a while, if I blip the throttle and vary the reves it does it less, no real big issue at all, it doesnt do it at WOT.
Rich fueling dramatically reduced the combustion temp...resulting in very little pipe glowing. Liht throttle setting will allow more air to back flow in the exhaust and this does tend to light off unburned mixtture in pipes but still adding a richer fuel mix will about always result in lower exhaust gas temps and much less visible color in the pipes.
It is funny but true...pretty much all bikes will do this. I see it on the dyno every day but to differing degrees. I have even managed to get a two stroke expansion chamber this hot...the whole thing bright red and alive from header to stinger so yes, it is normal-ish.
This is the part about varying degrees. Under about 2% CO at light throttle is where the most color will be visible. Always on twins, the rear header looks to be glowing brighter (at least on the dyno and on the road) since it get far less air cooling being all shrouded in parts back there.
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