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| 250cc and Above Engine Tech Technical Discussion Forum for 250cc and up Engines |
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#1
02-05-2015, 08:33 PM
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300xrx re-jetting?
Hey guys! I'm new here. Got the family a pair of Trailmasters for Christmas, a 150xrx and a 300xrx. I recently installed a Uni filter on thr 300 and I plan on doing the exhaust as well. I understand I'll probably need to change the carb jets, but I don't see any listed online anywhere for the 300. Would the jets for a 250 gy6 be the ones I need? Or is there a source for the 300?
Really lovin' the buggys, btw, and finding these forums full of information was one of the factors that led to me taking the plunge on them! |
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#4
03-02-2015, 07:20 AM
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Arrrgh! Well I pulled the carb yesterday only to discover that two of the screws on the bowl are "tamper proof". There are brass screws with no slots. I may try dremel slots for a screwdriver, but there's not a lot of material there.
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#5
03-02-2015, 08:49 AM
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Grind the heads off with your dremel to get the bowl off or drill head off using a drill than using vise grips remove what is left of the screw. You'll need to replace the screws which can be purchased from Fastnal supply. If you have a problem locating the metric screw give me a call 662-301-1563 I have them in stock.
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#7
03-02-2015, 09:52 AM
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Bigger is not necessarily better. If the engine does not pump the volume necessary to efficiently operate the larger carburetor you will actually loose performance. The stock carb supplied is more than enough for that engine.
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#8
03-07-2015, 03:26 PM
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Cool. I'll probably be giving you a call about the screws. Now that I know I don't need a bigger carb, and one of other posts saved me from spending money on a hi-rev cdi, I'll have more to spend on other mods! Thanks for the info!
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