Hello all, I have got my bike jetted in and it runs great, but I can't help but to think of this tick. There is a slight tick audable from the motor at high RPM's, is this normal or should my valves be adjusted? I would make a video but i lost my transfer cord and i don't think the recorder would pick up the noise.
pretty sure im running too rich with the 135 main right now, the inside of my pipe is actually a little damp with lots of carbon buildup. ill try it tho
After reading this I decided it may be misleading, so I have decided to re-write it.
If you can borrow someone phone or vid cam make a vid.
On the jetting subject (I know it's annoying to have to take the carb off and apart but)- now that you have found the ''correct'' main jet size, try dropping your edit: needle clip position down until it starts to splutter in high revs. Once a splutter or hesitation (usually accompanied by popping in the carb) is noticed raise the jet needle clip position two settings. This should be the best set-up for fuel economy and performance.
This may even fix your ''engine noise'' as it could be running too rich or lean.
Jarrah
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2000 TT-R250M-
Spoiler
Ported & polished, 73mm bore, Wizeco piston, US header pipe, FMF Q4, #150 main jet, #52.5 pilot jet, throttle stop screw adjusted, larger snorkel, GYT-R air filter, NGK Iridium spark plug, 14/51 gearing, NOS +
pretty sure im running too rich with the 135 main right now, the inside of my pipe is actually a little damp with lots of carbon buildup. ill try it tho
I did say that Mikuni jets are in thoery ten sizes larger so maybe closer to #130 (as previously mentioned) would have been better.
That said, you can't be too far out if it's not spluttering bad.
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2000 TT-R250M-
Spoiler
Ported & polished, 73mm bore, Wizeco piston, US header pipe, FMF Q4, #150 main jet, #52.5 pilot jet, throttle stop screw adjusted, larger snorkel, GYT-R air filter, NGK Iridium spark plug, 14/51 gearing, NOS +
In the middle clip position, while rolling the throttle off slowly, once in a while you may hear the subtlest hickup from the bike, it was so subtle that you would have to roll the throttle off very slowly and listen very carefully. I have just dropped my needle clip position (i know what you meant, no need to edit haha). I didn't ride the bike much, just putted around the yard a little bit because it's getting dark. So far, no sputtering. matter of fact, it felt like it had more power :s . Will give an update tomorrow.
It's not a ping, it's more like a knock but it's not very noticable. I'm just hoping I don't need new crank bearings or other bearings. I don't think the bike is lean because it doesn't seem to run hot and the pipe never glows red.
