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Post by david3336 on Aug 11, 2013 11:48:58 GMT -5
I have done many 47 and 50 mm bbk is there anything i would have to do differant with the 52mm bbk like extra base gaskets or anything. any help from someone who has done the 52mm bbk would be great. i know it said compression should not be over 220 after break in. can you use stock head or the 50mm big bore head with this kit. i was thinking 52mm bbk with the bb head. again any help would be great. thanks
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Post by david3336 on Aug 11, 2013 8:01:16 GMT -5
look at the propell bikes they clam they can be used
as off road i have owned a propell 50 cc it was a well built bike
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Post by david3336 on Aug 11, 2013 7:49:10 GMT -5
yes you can i have done it 100 times with no ploblems
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LOST POWER
by: david3336 - Jun 20, 2013 19:23:54 GMT -5
Post by david3336 on Jun 20, 2013 19:23:54 GMT -5
check to see if the vaccume lines from the carb to the fuel control valve are in good shape no cracks or splits dry rot so on. and also like post above said check valve adjustment. what does spark plug look like the way it burns can tell u alot. white not enough gas black too much gas golden brown just right.
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carb help
by: david3336 - Jun 20, 2013 19:08:24 GMT -5
Post by david3336 on Jun 20, 2013 19:08:24 GMT -5
the bike has 80 kit big head race cam 20mm  main jet free flow filter race cdi the problem i have started after installing 20 mm carb with jet when motor is at high rpms it makes a burping sound from air filter i have tried set a/f screw more open and more closed no matter where it is set still same noise any help would be great. |
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Post by david3336 on Jun 10, 2013 20:51:01 GMT -5
well that 50 got 50mm piston race cam big head racing cdi and 20 mm carb and jet it gets the job done at about 50 top speed |
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Post by david3336 on Jun 10, 2013 20:42:59 GMT -5
lol i just took one of my bbk 50cc and out run that 150 it still needs help
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Post by david3336 on Jun 10, 2013 20:17:07 GMT -5
yea thats kinda my thoughts from the start it was running good just needed more speed so i was thinking more fuel and more air more speed when balanced correctly i think its doing all it can with the amount of fuel and air it has to work with. thanks alley for your help you always help me out even on the old forum. i let you know how it play out when i rejet and free flow it
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Post by david3336 on Jun 10, 2013 20:02:37 GMT -5
by giving it more air it will now get up to 45 on flat ground. im so thinking going with 115 main jet and a free flow air filter that worked great on my sons 150 what do you think alley or anyone
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Post by david3336 on Jun 10, 2013 19:44:37 GMT -5
if you spray fuel into the intake does it try to run
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Post by david3336 on Jun 10, 2013 19:22:31 GMT -5
with the cover off the belt seems to climb all the way to the top on the stand but have not checked riding. the belt looks to be in great shape and the scoot only has like 1800 miles on it. i tried the a/f screw and didnt see any change in top end speed where it is now was the best setting so far just seemed to be lil rich thats why i drilled holes in air box to lean out insted of changing a/f screw it idles good and responds good where it is set now and low and mids are great just missing that top end speed
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Post by david3336 on Jun 10, 2013 19:01:22 GMT -5
doing another plug check in a few mins after extra air holes ill post change if any
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Post by david3336 on Jun 10, 2013 18:59:39 GMT -5
yes on a/f mix and no on tach just sounds like its lil low on rpms compared to my vip witch has a tach and it runs from 7000 to 8000 all the way through
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Post by david3336 on Jun 10, 2013 18:57:21 GMT -5
i have a vip 150 with racing clutch and 12gram sliders and racing cdi it will do 65mph gps and it has no other performance upgrades
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Post by david3336 on Jun 10, 2013 18:54:47 GMT -5
ok after a 2nd plug check wot hit kill switch its looking a lil to the rich side so i drilled a few holes in air box where it still has to pass through the filter. plug was lil more black than brown
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main jet free flow filter race cdi the problem i have started after installing 20 mm carb with