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Post by bluesi808 on Dec 6, 2012 0:25:02 GMT -5
I have a keeway matrix, minarelli copy. Currently I have a 17,5 delly carb, polini sport, zxr exhaust, I got about 2k miles on this motor and looking to upgrade to the stage 6 mkii, what would be the best setup money can buy? I heard some good things about windjammer and yasuni exhausts? Any suggestions?
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Post by skuttadawg on Dec 6, 2012 0:38:02 GMT -5
With a 2T jetting is picky and very important to avoid being lean and having a soft seize . a free flow exhaust with restricted head may not give you desired results since you may need to port the head . On my stock engine the port was a D shape instead of an O . Replace the metal reeds with FG or CF can help . I use NGKBr8HIX sparkplugs with Motul 710 full synthetic 2T oil . NEVER use weedeater oil and it is worth the extra to get at least decent 2T oil . Mine came with a 19mm TK carb with 68 main jet and I put in a 75 and it ran better . I put in a racing CDI which helped takeoff but did nothing on top end since the head and exhaust was restricted to 8,000 RPMs . I now have a 72cc BBK with MMG pipe and Uni airfilter . I lost some take off since the free flow does not allow pressure to build up in the pipe but top end and RPMs are way more . Drawback is it is so loud it has exhoed and made my ears rings as I sound like a cross between a weedeater and a motorcross bike . A HP exhaust you will need to have a few main jets to test out until you have the jetting dialed in . Now I put on a Uni vent cover which is smaller than the big red airfilter and used a 90 main jet and wow it had more power on the bottom end and midrange . I later put on the correct Uni it had some bog but not bad and soft seized with the sparkplug becoming welded together . NEVER ride a 2T that has bog . I took off the air box cover just to see how it would run and it bogged so bad I did not get off of my driveway . Here is great write up of 2T exhausts . If you have the money pipes made by Leo Vince are a lot better than most . 49ccscoot.proboards.com/index.cgi?board=exhausted&action=display&thread=1391 |
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Post by aeroxbud on Dec 8, 2012 14:14:42 GMT -5
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Post by skuttadawg on Dec 9, 2012 23:27:48 GMT -5
Great report I decided to go with Stage6 myself over Athena . a 17.5 is small for a 72cc the power kits come with a 21mm PWK carb
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Post by 2strokd on Dec 10, 2012 10:14:27 GMT -5
Man! What a killer deal on that kit Scooter Attack has for the day!
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Post by martyd on Dec 26, 2012 3:23:39 GMT -5
MKII sport pro cylinder kit/ Stage 6 hpc crank/ MKII clutch/MKII clutch bell/stage 6 24mm carb/Stage 6 overrange variator kit with belt/ and final gears just my opinion. A few other odds and ends but that is the majority of it
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Post by bluesi808 on Dec 26, 2012 21:19:14 GMT -5
Can u use a 24mm carb with a stock airbox?
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Post by martyd on Dec 27, 2012 0:54:38 GMT -5
I dont know of any reason why you could not but i really do not know any reason why you would
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Post by 90GTVert on Dec 27, 2012 10:10:20 GMT -5
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Post by bluesi808 on Dec 28, 2012 14:41:50 GMT -5
I don't like how it sounds without the airbox
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Aaron420e
Scoot Enthusiast
2008 Keeway F-ACT Racing
Posts: 430
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Post by Aaron420e on Dec 31, 2012 6:06:49 GMT -5
So... Have you ordered/received the Stage6 Sport Pro MKII yet?
I have one, but it isn't installed at the moment. Needs a new piston. (long story)
You will not be disappointed with it. As long as you get a pipe that will let it rev to 10,000+. :burnout:
Stage6 MKII + Stage6 Pro Rep pipe + 21mm Dellorto PHGB = 70mph!!! :riding:
If you have the cash to get the Yasuni C20... It will rev even higher.
Probably won't last long at 12,000rpm, but it will be hella fun while it does. :rockon:
Keep us updated on the build.
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