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Post by scoots on Aug 9, 2013 23:04:33 GMT -5
just now found that out the hard way
go to install my stock 75 jet and now it wont start i hae no clue why atm jets cleaned and all
but my air filter somehow shreaded at the clamp
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Post by millsc on Aug 9, 2013 23:10:39 GMT -5
gotta tighten the clamp when it is all the way forward on the carb or it cuts the rubber on the filter been there done this
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Post by scoots on Aug 10, 2013 6:03:06 GMT -5
it will not start now why couldnt i use a  ? |
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Post by devo344a on Aug 10, 2013 9:00:03 GMT -5
I have a 80cc bbk with a-9 cam stock 19mm carb and an jet and it runs great |
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Post by scoots on Aug 10, 2013 12:52:23 GMT -5
im baffled now it ran with the now with stock 75 wont start\ |
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Post by devo344a on Aug 10, 2013 13:05:41 GMT -5
Did you check all the usual stuff ? spark,vacum leaks, fuel,? start there if it ran with the it should run with the 75 maybe not good but it should run I tok a  jet and drilled it out it had to be close to  or  and it ran but it didnt run good |
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Post by scoots on Aug 10, 2013 13:49:40 GMT -5
ima try my valves soon
but idk what jet i should run i want bigger but who knos
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Post by brandjur on Aug 10, 2013 15:59:24 GMT -5
Didn't realize you have an 80cc bbk. Did you just recently add it to your signature? You should try + MJ with that. |
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Post by scoots on Aug 10, 2013 16:24:40 GMT -5
see at jet made me go30 then it back pop out my carb |
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Post by brandjur on Aug 10, 2013 17:37:51 GMT -5
I would bet it ran hot too. That pop shows it is running lean. If it was too rich, you would most likely experience a bog. Try a 92- main jet. |
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Post by scoots on Aug 10, 2013 17:41:45 GMT -5
why so high? the stock jet is 75 lol
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Post by brandjur on Aug 10, 2013 18:30:09 GMT -5
why so high? the stock jet is 75 lol You have a big bore kit. So the extra displacement needs more fuel. Try 92- main jet. If you run the 75, it has a chance of detonating or burning a piston from a too lean condition. Do some research and you will see what people are using for big bore kits. I have a 72cc bbk and I use a main jet. |
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Post by skuttadawg on Aug 10, 2013 23:49:57 GMT -5
The main jet is for top end where the idle jet is used at starting and idle . Any vacuum leak like a cracked or pinched hose as well as intake and airbox . Remove the idle jet and clean it carb cleaner spray or a stiff solid wire . Does it seem to start and idle diff with the BBK compared to stock engine ? My 2T came with 40 IJ which I had to give it s sip of throttle to start , more so with BBK and it always needing the idle speed adjusted as the temp changed and would not idle for a long time without stalling when warm . I replaced it with a 45IJ and tada , no throttle to start and no idle or stall issues . It would sometimes want to stall a bit if I was zooming and stopped real fast .
After cleaning the idle jet and check for leaks , you should check the valves with the engine cold . All 4Ts will need adjusting at least once . When they get too tight they limit the amount of air and fuel which can make it hard to or unable to start and also stall when warm
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Post by skuttadawg on Aug 10, 2013 23:56:47 GMT -5
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Post by scoots on Aug 11, 2013 9:44:19 GMT -5
it started right up ....so u think i should go higher jet?
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?
jet and drilled it out it had to be close to 
or 
and it ran but it didnt run good 
