rattling noise. need help

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HI808SYM
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rattling noise. need help

Post by HI808SYM »

bike rattles
Last edited by HI808SYM on Thu Oct 13, 2011 4:49 am, edited 1 time in total.
eliteguy50
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Re: rattling noise. need help

Post by eliteguy50 »

HI808SYM wrote: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?
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devenex
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Re: rattling noise. need help

Post by 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?
1986 Spree w/ '87 SE50 motor
1985 Aero 50 w/ Dio motor: On Hold
HI808SYM
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Re: rattling noise. need help

Post by HI808SYM »

eliteguy50 wrote:
HI808SYM wrote: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?)
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evilone
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Re: rattling noise. need help

Post by evilone »

Bad piston rings?
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Dio89Elite
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Re: rattling noise. need help

Post by 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.
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Re: rattling noise. need help

Post by iceman77 »

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



TJ
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