Well, I'm on the other side of the planet, but I think your jetting is pretty well spot-on.....
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| Piped S1 250 in Action http://kawi2strokes.com/forum/viewtopic.php?f=22&t=629 |
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| Author: | Charcoal [ Wed Jul 20, 2011 10:17 pm ] |
| Post subject: | Piped S1 250 in Action |
Here's a 2nd gear roll on vid. Yea it's a bit dark, but the sound is all we're after here. My pal is pacing me on his mod Yam FJ 1200. He's got an S2A also. Feel free to check out some of his other really neat motorcycle vids if you get a chance. http://youtu.be/1uFotaDtNf8 Dave. |
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| Author: | RODH2 [ Wed Jul 20, 2011 10:31 pm ] |
| Post subject: | Re: Piped S1 250 in Action |
Well, I'm on the other side of the planet, but I think your jetting is pretty well spot-on..... .
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| Author: | Evans Ward [ Thu Jul 21, 2011 6:18 am ] |
| Post subject: | Re: Piped S1 250 in Action |
That does sound crisp, smooth, and clean! Nice!  
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| Author: | Charcoal [ Thu Jul 21, 2011 5:11 pm ] |
| Post subject: | Re: Piped S1 250 in Action |
Thanks guys  Some of us may recall that this bike was (is) an S2A that I "smallbored" just for the hell of it. I'm using the S2's 24mm Mikuni's because they're perfect, and I figured it couldn't hurt, plus the 22's I had needed major rebuilds and a throttle cable.Jetting ended being remarkably easy. Using the stock airbox and the chambers, I ended up with 82.5 mains, 25 pilots, and needle clips are on 2-1/2(from top). This puts me exactally 3 sizes above stock S1 jetting. I 1st tried 87.5's mains and the bike was pretty much un-rideable-Pig Rich. Thats when I went to the 82.5's and dropped the needles from #3 to #2-1/2. I know for fact that I can go down 1 more main jet size and/or drop the needles farther, but I'd much prefer to play it safe+ it runs perfect as is. Oh yea, I did a top speed run with it also. The tach showed 8900rpm in top gear max. The speedo waves above 80 so it was useless. I found the speed/gearing/rpm calculator site and determined that with the stock 14t up front, a 46t out back, @8900rpm, it was going 93.8 mph. "Thats all there is and there aint No more !" Cheers, Dave |
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