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Post by dude on Mar 21, 2012 21:29:40 GMT -5
Just would like to know what type of comp. readings you have w/ 70cc or 83cc kits? Which head where you using? Even what cam did you use. thanks
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Post by Deleted on Mar 21, 2012 21:52:58 GMT -5
190psi on one of my 83cc bikes and turns over and cranks fine with a 90cca batttery but thats with 2 thick hoca base gaskets. its has done 4500 miles so far and is a good reliable cranks-every-time 50mph bike. the other has one standard base gasket with a 14ah 190cca battery and it wont crank for shit....i have to nearly jump onto the kick starter to crank it but it runs about 60 mph once its running lol
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Post by peteyparado on Mar 22, 2012 5:34:32 GMT -5
1fastqmb what kind of head you got on your two scooters?
And for a 50mm bbk with a hoca 50mm performance head witch gasket is better for me
Thick paper or metal one?
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Post by Deleted on Mar 22, 2012 8:05:59 GMT -5
you cannot use anything other than metal for the head gasket. my heads are 50mm stock valve. high compression comes from the smaller combustion chamber of the stock head...and sometimes its too high for these pitiful little starters even with a matched head. you are now to the point where a compression gauge is needed. does it start ok?
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Post by peteyparado on Mar 23, 2012 5:08:18 GMT -5
ok!! is starts with the electric starter it does have a hard time on the compression stoke but it starts idles fine rev's to the 7500-7900rpm but i can tell it has a hard time getting there. is that signs of high compression? i ordered a compression tester cause i had the hardest time finding a 10mm spark plug thread.. i'll post the numbers soon.....
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Post by peteyparado on Mar 23, 2012 5:10:16 GMT -5
dude- i used the stock for both 72cc an 82cc bbk's the cam is an A9 from scappydoggscooter.com
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Post by Deleted on Mar 23, 2012 15:02:53 GMT -5
ok!! is starts with the electric starter it does have a hard time on the compression stoke but it starts idles fine rev's to the 7500-7900rpm but i can tell it has a hard time getting there. is that signs of high compression? i ordered a compression tester cause i had the hardest time finding a 10mm spark plug thread.. i'll post the numbers soon..... thats a sign of off timing. |
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