rattling noise. need help

[HI808SYM]

bike rattles

[eliteguy50]

setup is:
72cc malossi cast iron.
19mm Keihin with stock manifold and oil pump. (40 main and 100 pilot jets)
KOSO variator with stock clutch setup. (8g weights)
Honda GOSHI exhaust (japan dio goshi)
9 to 1 gears.

Are you running any premix to supplement the stock oil pump?

[devenex]

The slow speed might just a tuning issue. What weights are you using in the variator and did you change the centerspring in the clutch?

As for the rattling, does it change with RPM? Velocity? Have you been doing plug chops to check your mixture? What type of premix are you running and what ratio?

[HI808SYM]

setup is:
72cc malossi cast iron.
19mm Keihin with stock manifold and oil pump. (40 main and 100 pilot jets)
KOSO variator with stock clutch setup. (8g weights)
Honda GOSHI exhaust (japan dio goshi)
9 to 1 gears.

Are you running any premix to supplement the stock oil pump?

yeah i mix 1 ounce per gallon in addition to running the stock oil pump.

You think that it may be a fuel/mixture issue causing the noise?

i check my plug and the tip is a brownish color. but my manifold sweats a lot (would that be an indication or too rich?)

[evilone]

Bad piston rings?

[Dio89Elite]

did you ever find out what the rattling noise is?

I am trying out the same exhaust (Honda Goshi) and I am experiencing a rattle noise now that wasn't there before. I have assumed it to be the small metal guard that is near the front of the exhaust pipe.

[iceman77]

rattling noise could be from the piston being put in backwards. check to make sure you put it in correctly.



TJ