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Post by energeticrain on Nov 17, 2012 14:20:15 GMT -5
hi all i have a tgb202 which i have fitted a 70cc kit and a tecnigas exhaust it will run ok but any more than about a min at wot throttle it dies and takes about 5 mins of kicking to get started again..i have changed main jet in carb i have tried a range of jets from 0.65 to 1.05 i have removed petcock and run gravity fed i have also tried a sport filter... anymore ideas pls
thanks in advance............
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Post by teddy554 on Nov 17, 2012 14:23:42 GMT -5
To much compression will make a motor run hot also whats is your squish set at also
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Post by jlee on Nov 17, 2012 14:31:43 GMT -5
Sounds like you are emptying the carb bowl - may be time for an electric fuel pump.
I had a similar problem - engine vacuum at WOT was not enough to keep the petcock open (but you said you removed yours).
P.S. - it should start fairly easily when this happens if you keep the throttle held wide open while cranking...
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Post by energeticrain on Nov 17, 2012 15:08:12 GMT -5
cheers dont know my squish clearance but i dont have a head gasket on il try it tomorro ..cheers
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Post by gregw on Nov 17, 2012 15:13:12 GMT -5
Ok, changed exhaust, but what about rollars? Might not be able to rev up to new power band, and flooding out (mine did something similar before I learned about rollars, and after I installed my technigas).
So, did you replace your stock rollars with lighter ones after you installed your technigas?
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Post by energeticrain on Nov 17, 2012 15:24:47 GMT -5
cheers for advice where can i get a electric fuel pump from and what type do i need..........
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Post by energeticrain on Nov 17, 2012 15:26:35 GMT -5
no still on stock rollers what weight would you try
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Post by gregw on Nov 18, 2012 12:12:26 GMT -5
go with 5 gram rollars, but you might need a balanced mix of 4 and 5 gram rollars to get it dialed in. Too light and it won't shift (variate), too heavy and it will shift too soon and not rev up into power band. Two strokes produce great horsepower, but not if it's not set up right...
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Post by jlee on Nov 18, 2012 12:26:29 GMT -5
An electric fuel pump is only for fuel injected motors... NOT for carburated motors... Don't know where you got that info - I have an electric fuel pump on my carbureted Kawasaki, as well as my friend's carbureted Yamaha. It has nothing to do with how the engine is aspirated... |
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Post by jazzman on Nov 18, 2012 15:02:06 GMT -5
On the scoots you really do not need an electric pump that is overkill. Now it also depends where you gas tank is mounted, if your gas tank is lower than your carb you need a Vacuum operated pump, if the gas tank is mouned above the carb you need a PETCOCK it is a gravity fed system and in this case you can replace the PETCOCK with a shutoff valve. If the tank is below the carb you can get a VACUUM OPERATED MIKUNI SINGLE FUEL PUMP they pump a lot of fuel more than you need. www.aircraftspruce.com/catalog/eppages/mikunifuelpump1.php |
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Post by jlee on Nov 18, 2012 16:06:20 GMT -5
On the scoots you really do not need an electric pump that is overkill. Yeah, for a 50cc, non-racing scoot I agree. |
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Post by jazzman on Nov 18, 2012 22:35:05 GMT -5
On the scoots you really do not need an electric pump that is overkill. Yeah, for a 50cc, non-racing scoot I agree. Yea, I see a lot of the guys on here with racing motors pumping out over 20hp. ;D  |
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Post by super9 on Nov 28, 2012 7:51:04 GMT -5
I always thought if you are going to get a bbk you are going to need to replace the carb for a bigger one?
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Post by skuttadawg on Nov 29, 2012 1:20:56 GMT -5
What size jets and which sparkplug ? I like NGKBr8HIX over the 7 which was hotter than the 8 and it now runs better . I use a 105 MJ with Uni and MMG pipe and it screams
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