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Old 05-02-2009, 02:23 AM   #1
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Default Engine tunning problem?

I have a nova buggy engine using hong nor 053 pipe. The problem i face is the engine idle at a high pinch.

what i had tried:
- close the idle gap smaller but the engine will die off
- rich abit the low end needle the engine will be too rich and cut off when on/off throttle
- lean the low end will increase the high pinch sound

anyone have any ideas? can the clutch system casue this to happen?

Thanks
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Old 05-02-2009, 11:36 PM   #2
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anyone??
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Old 05-02-2009, 11:47 PM   #3
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Sounds like you have an air leak. Check your tank and fuel lines first and if they're ok make sure from bearing is still good.
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Old 05-03-2009, 01:22 AM   #4
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Originally Posted by slumlord View Post
Sounds like you have an air leak. Check your tank and fuel lines first and if they're ok make sure from bearing is still good.
from bearing. i think he ment front bearing btw
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Old 05-03-2009, 03:32 PM   #5
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Quote:
Originally Posted by losi_racer View Post
from bearing. i think he ment front bearing btw
air leak or way too lean low speed needle
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Old 05-04-2009, 09:31 PM   #6
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Hi all, Thanks for the reply! I dun think is the front bearing problem as it still looks gd. However my engine is shimmed for 25% but im using 16%, will it affect? Anyone care to share their nova .21 needle setting so that i can check against mine! Thanks!
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Old 05-04-2009, 09:36 PM   #7
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what nove engine/carb
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Old 05-04-2009, 10:11 PM   #8
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keep leaning the bottom end a hour at a time while lowering your idle screw...you should be able to let the buggy sit and idle for 10 seconds and then nail the throttle..and it should take off clean with out hesitating or blowing out alot of smoke..but you gotta remember to LOWER the idle screw as you LEAN OUT the bottom end screw

Nova's are finicay and hard to tune sometimes..
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Old 05-04-2009, 10:55 PM   #9
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what nove engine/carb
is a novarossi S421BSX buggy long stroke engine!
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Old 05-04-2009, 10:57 PM   #10
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Quote:
Originally Posted by yoshgixxer View Post
keep leaning the bottom end a hour at a time while lowering your idle screw...you should be able to let the buggy sit and idle for 10 seconds and then nail the throttle..and it should take off clean with out hesitating or blowing out alot of smoke..but you gotta remember to LOWER the idle screw as you LEAN OUT the bottom end screw

Nova's are finicay and hard to tune sometimes..
Yape.. thanks for that, i will try it again! but once is done, i let the engine cool and n restart i will have problem idle it...lol!
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