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| < Modifications - Mini Off Road Kart ~ exhaust upgrade rejet question |
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I have a 150cc kinroad. The mod's i have made are as follows:
full mrp header and exhaust kit.mrp heavy duty clutch with 1500Ib spring.dr pully variator with 10 gram rollers.I changed from a 112 stock jet to a 137.5 jet. I still have the stock carb.
The thing i am concerned with is the plug still is white in color when i check it.It kind of lost power over the stock set-up,before, it would get up to 7500rpm and now it has trouble making it there. Being that the plug is white when i check it, is it possible that it is still lean with this set-up?
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Sponsor
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do you have the stock air box on it still? if so thats is resticking the air flow that you need
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Blade buggies,Carter buggy's, ams (manco) , joyner, parts for almost anything
MRP dealer
Tucker Rocky Dealer
Vega Helmet dealer
I.T.P. tire and wheel dealer
www.mcdonoughpowersports.com
Eric Jackson
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I would say yes, but I dont run stock carb.Make sure your intake manifold doesnt leak.With that new ex. the motor new more fuel I think youll b happy with it!
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Blade DX 150*
* on the juice
Sunl 150
440 Yamadog
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Sponsor
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I do not have the stock airbox. It is a mrp air filter. Do you guys really think it can be lean? What jet should i go up to?What are some other symptoms of a lean set-up.Also, with the set-up that i explained previously, what kind of rpm should this thing hit? Shouldn't it be higher than stock?
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get it running and spray some carb cleaner around the intake and see if the idle changes. the rubber intakes are bad about cracking around the bolt holes and will cause a leak, maj=king it run lean.
_________________
Blade buggies,Carter buggy's, ams (manco) , joyner, parts for almost anything
MRP dealer
Tucker Rocky Dealer
Vega Helmet dealer
I.T.P. tire and wheel dealer
www.mcdonoughpowersports.com
Eric Jackson
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I already sprayed around the intake to check for leaks and i didn't find any.Any more idea's. What jet should i go to next? What kind of rpm should it hit now?
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Sponsor
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are you useing a new plug evrytime you check it? if using the same plug you could be getting a false reading.
it should hit at least 7800 rpm. when you installed the rollers and main spring how far down the clutch pulley is the belt? it only needs to be no more than 1/8 down in the pulley. if more than that it will act like its in high gear
_________________
Blade buggies,Carter buggy's, ams (manco) , joyner, parts for almost anything
MRP dealer
Tucker Rocky Dealer
Vega Helmet dealer
I.T.P. tire and wheel dealer
www.mcdonoughpowersports.com
Eric Jackson
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If the plug is white/white I would buy a few starting at the second next one on the jet chart.Like I said I dont run stock carb so BigE can help you better on that CV carb. Sorry!
_________________
Blade DX 150*
* on the juice
Sunl 150
440 Yamadog
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Should i try to go up to a 140 jet? what kind of symptoms will the buggy show if it is getting to rich?
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Sponsor
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| priority222 wrote: |
| Should i try to go up to a 140 jet? what kind of symptoms will the buggy show if it is getting to rich? |
Start at a 140 and test with a fresh spark plug. If you're too rich you're gonna run rough (bog down) and the spark plug will look charcoal black.
If your plug is really white where you're at now, I'm pretty sure a jump to 140 won't overshoot you to running too rich.
-Mike
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http://www.buggypartsnw.com
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