cfn
Scoot Member
Posts: 42
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Post by cfn on Jul 14, 2011 14:15:40 GMT -5
After about 400miles on the 70cc BBK my speed has been droping.I was running at a steady 37/42 mph with a top end of 51mph.Now it will only run 37 top end.I did a comp test and it was 57.Think it may be time for a new piston and rings....... :wheelie:
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Post by 90GTVert on Jul 14, 2011 14:30:37 GMT -5
I think something is wrong with your compression tester. At 57psi, you would be lucky if it starts.
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cfn
Scoot Member
Posts: 42
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Post by cfn on Jul 14, 2011 16:08:55 GMT -5
I just checked it again it was at 62 psi. What should the psi be at?
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Post by lshigham on Jul 14, 2011 16:26:54 GMT -5
Over 100 at least is required to even run.
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dr1445
Scoot Enthusiast
Posts: 199
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Post by dr1445 on Jul 14, 2011 16:28:45 GMT -5
did you hold the throttle wide open when you did the test? if not you will get a low reading for sure..
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Post by 90GTVert on Jul 14, 2011 17:41:42 GMT -5
Throttle wide open and kick start usually gets the best result.
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cfn
Scoot Member
Posts: 42
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Post by cfn on Jul 14, 2011 18:20:46 GMT -5
No i did not have the throttle wide open and did not use the kick start ill give that a shot. Thanks
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Post by 2strokd on Jul 15, 2011 8:35:52 GMT -5
Hold it WO and kick it sharp and quick to get the best reading.
Good luck!
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cfn
Scoot Member
Posts: 42
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Post by cfn on Jul 15, 2011 17:40:38 GMT -5
Ok did it the right way 117psi on the 1st 115 psi the 2nd time.With the 70cc bbk should i change the clutch, rollers and belt?
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