baby blue 72

[bakaracer]

you cant check the plug gap by looking at it. you have to measure the gap.if its to wide,the spark has a hard time jumping and that will foul plugs.

[sum-azn-kid]

funny that it ran before but with same plug. so the gap HAS to be checked with a feeler gauge or something right? to bad i dont have that or a new plug.

[kingearwig]

funny that it ran before but with same plug. so the gap HAS to be checked with a feeler gauge or something right? to bad i dont have that or a new plug.

autozone sells sh*tty ones for very cheap.. they are by the check out. not the most accurate but they are close.
and there is a easy way to tell if she is flooded... choke off, full throttle and kick repeatedly. she won't be flooded any more.

ok so i got the pipe and 28 oko in with 135 main and 50 pilot(motor is unported so amll jets)

Does anyone else think that this thinking is flawed? Seems to me that a lack of porting would lead to lack of air flow which to me does not indicate a smaller jet. Am I wrong in my thinking?

[sum-azn-kid]

i could be wrong but since i am getting less air into my motor compared to an elite since my intake port is smaller than the stock elite one, i wouldnt need as big a jet. it would make it too rich dumping more gas into the motor that cant take in alot of air. but im new to this

[Bear45-70]

Big carbs with low air flow thru them tend to need bigger jets because the low air velocity thru the venturi tends to not pull fuel like it does with and appropriately sized carb to engine choice. Too much carb causes poor low end and mediocre mid-range engine performance. Over carburation is the biggest and most often committed error of the hot rodder.

[losthope]

i would think It should at least run with those jets

[Bear45-70]

i would think It should at least run with those jets

I've seen engines run with amazingly rich and lean jetting. But run right and/or live, not gonna happen. Way to much carb to start with.

[kingearwig]

Big carbs with low air flow thru them tend to need bigger jets because the low air velocity thru the venturi tends to not pull fuel like it does with and appropriately sized carb to engine choice. Too much carb causes poor low end and mediocre mid-range engine performance. Over carburation is the biggest and most often committed error of the hot rodder.

this was my thinking exactly.... if the constriction on the air was after the carb... ie a restrictive air filter. then I would agree with the OP that one would then need a smaller jet(maybe) because there would be a slight amount of added "suction" on the jets. But less air flow means less fuel picked up in the venturi.

[sum-azn-kid]

what you are talking about is the venturi effect right? btw i got the bike started new plug and this weekend ill be upping the jets. thanks for the info guys. the shop owner rode my bike and loved the power that the Scorp. exhaust gave over the * PG long. ill never buy on of those.

[sum-azn-kid]

oh and what are some grippy tires? only ones my friends ran were S1 90/90 or hoop 80/90? any others? i ride to school everyday so has to be good in the rain. haha the stock duros dont feel safe, lil slip n slide when you gas from stop or turning on/off the road.

[elite_dub]

Over carburation is the biggest and most often committed error of the hot rodder.

Words to live by.. my 72cc either 24 or 26mm carbs 24mm preferably

Good tires are stock tires IRC's 3.00x10 or Michelin S1

[sum-azn-kid]

i've heard that too, but im going to go with the 28 for now. i think i pick up the S1 when i get the money aboud $80 for a pair at the harley shop. thanks btw what pipe and parts you running on your 72?

[maddog]

i would build up that gtr, the top end will smoke any 72cc honda/sym mine does 90mph

[elite_dub]

i've heard that too, but im going to go with the 28 for now. i think i pick up the S1 when i get the money aboud $80 for a pair at the harley shop. thanks btw what pipe and parts you running on your 72?

nothing special it's my daily so basic stuff, CT chrome, stage 6 26mm carb. , airbox, SEF Black, 7:1 gears..

[sum-azn-kid]

maddog how could you get that high of a top speed without gears? GTR 50 dont have gear kit.

Right now im running 150 main jet and 50 slow jet. at 1/4 throttle i can bury the needle just takes a long time. but when i go over 1/4 she bogs and slows done sometimes. this also happens when i go up a slight hill.