Nice job man! I want to see a launch video of this baby once its finished! CORN!!!!!!!!!!!!!!!!!
Power User
Roostin Away
Nice job man! I want to see a launch video of this baby once its finished! CORN!!!!!!!!!!!!!!!!!
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes
Loves Corn.
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I hate to say it,, but I probley wont even ride it.... maybe at ice fest breakin it in... theres no way ill rip it on the road with all the salt! Ill get it kinda close ,, finnish jetting in the dune's... this makes me overly excited to get to the dunes! I put my motorcross suspension in it.. So plan on some sort of Launch!Originally Posted by Yamaha_Rules69
Loves Corn.
Catch me if you can
Loves Corn.
Catch me if you can
Did a little wrenchin..Ended up running spacer plate,, 250 stuffer/intake heated up a touch,, and a 41.5mm slipped right in....
Power User
Roostin Away
Bryan, is there any way you could measure the inside next to the slide area and see if its a true 41.5mm for me? I've heard conflicting reports on what size it actually is from sudco. Most shops can only bore them to 40mm because of the fixed needle jet venturi.
4 Strokes are NOT the wave of the future!
Loves Corn.
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the fixed needle and venturi,, stick out past the bore
Power User
Roostin Away
How about the actual bore diameter in the slide area? I know you can make them 41.5mm on the reed side of the carb, just wondering about the slide area to see if its a true 41.5mm carb or just a taperbore.
4 Strokes are NOT the wave of the future!
Loves Corn.
Catch me if you can
Confirmed 41.5mm..............and as far as taper bore,, yes the intake side is taperbored...see how close it is to the brass pin.
Last edited by Bryan Raffa; 12-24-2010 at 06:06 PM.
Power User
Roostin Away
Your on the right track. What I'm meaning though is if you can get a measurement inside where the throttle slide moves up and down and see if that is 41.5mm. From the bored ones I've seen they taper from 41.5mm on the reed side down to 40mm area where the slide is. Just seeing if sudco does it that way.
4 Strokes are NOT the wave of the future!
Loves Corn.
Catch me if you can
well I dont have a bore mic.. so you gonna be left wondering!!! hahahah!
Just Too Addicted
Arm chair racerJust too addicted
I sent my PWK39 to Jason Hall to be bored to the maximum......I never measured it, however he told me it came out to almost 41.75. Its right at the edge on the slide. Runs perfect with out a problem.
1985 KXT250 A.K.A. "Doom"/Multiple Engine Combinations/Jason Hall Inverts/HRE Swing Arm, Cal Fab Swing Arm/Jemco Pipe/Buzz Saw Cylinder, Klemm Research Cyinder/PWK Carb/PVL Ignition/Dura Blue Axle/Mosh Custom Seat
Power User
Catch me if you can
Good god, .25MM = .010 THOUSANDTHS, .5MM = .020 THOUSANDTHS, the thing is gonna screw regardless....
Last time I saw it run was Trikefest 08
Great build Raffa!! And certainly a tribute to THE MAN!
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country
Power User
Got the holeshot
40mm vs. 41.5mm = 7.6% difference in area.. The 8% difference going from a 38 to a 39.5mm is noticable even on a 250.
no doubt..
2-stroke lover
Loves Corn.
Catch me if you can
The Elves over christmas,, installed my front cailper and polished master reservoir..
Loves Corn.
Catch me if you can
Orderd up some Skat Trak Hauler 20x11x9 9-Paddle Tire... super excited to get this bike rolling!!!!!!!!!!!!!!!!!!!!!!
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