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SSW Support Staff
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Discussion Starter #1
Well I finally found and exhaust that will actually give more power for the Carter gtr. Its a slip on style muffler and staright thru design, with it and a K&N filter, 135 main jet, 35 pilot jet and the clip moved to the secound notch I picked up better throttle response and 3.6 mph.

Still a tad lean on the top end so I will install a 138 main and see how that does.









video link

http://www.youtube.com/watch?v=4CPiRK_FjwM
 

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SSW Support Staff
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Looks good and sounds good. Is that muffler made for the Carter, or did you have to look until you found something that would work and fit?
 

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Discussion Starter #5
this exhaust is one I imported to try on the carters. there is another exhaust out there but its only bling and doesn't give any real power.

this set up is for a 300cc scooter, the stock header is 1 1/8 outside dia. I have tried 4 different slip on mufflers, this is the only one I have found that's affordable for everyone and showed a real power gain.
 

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Discussion Starter #6
finally got around to playing with the jetting some more, found it likes a 138 main jet, 35 pilot jet and the clip on the second notch, picked up 2 mph, no more back fire and better throttle response.

makes it alot more fun, now have to start on the hid light kit
 

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SSW Director
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bige said:
finally got around to playing with the jetting some more, found it likes a 138 main jet, 35 pilot jet and the clip on the second notch, picked up 2 mph, no more back fire and better throttle response.

makes it alot more fun, now have to start on the hid light kit
Eric, It's a "Good Feeling" when you get the jetting dialed in isn't it. :D :wink: Are you using a Mikuni ?
 

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Discussion Starter #8
its a Keihin slide carb. yes it does feel good to get everything working right. the new muffler sounds nice when I let off of it, the clutch doesn't disengage until low rpm so its like and engine brake
 

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Discussion Starter #9
got a little more tuning done on the gtr in between cool downs on the wife's. installed a 140 jet, picked up another 1.67 mph. plug color is a nice Hershey bar brown. just has a tad bit of a flat spot just before wot. but has alot better take off and acceleration
 

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SSW Director
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bige said:
got a little more tuning done on the gtr in between cool downs on the wife's. installed a 140 jet, picked up another 1.67 mph. plug color is a nice Hershey bar brown. just has a tad bit of a flat spot just before wot. but has alot better take off and acceleration
Dialing her in !! :D :wink:
 

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Do you have a total gain figure yet. I'm interested in seeing how much of a diffence it made. Is there a lot of difference between the 300 and a CF moto 250?
 

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Discussion Starter #12
so far I have picked up 4.67 mph and alot better throttle response. there is a big differance between the sym 300 and the cfmoto250. the sym has 24 hp stock and the cf has 14, the sym has a 4 valve head, ceramic coated cylinder, longer stroke and a bigger bore.
 

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I haven't seen a lot of buggies using the Sym besides Carter. Are they fairly easy to get parts for? I looked at Sym's website and it looks like they make some good motors. I wonder why a buggy manufacturer hasn't used the 500 in a small buggy?
 

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Discussion Starter #14
carter is the exclusive distributor for SYM. they will have the 600 in the matrix this summer. they are easy to get parts for
 
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