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ignition question...

tried it on a 76 Merc with the Thunderbolt ignition...couldn't get it to run right. For some reason the throttle response suffered. Also tried it on my old John Deere pulling tractor...that didn't work out either. Don't know why, I figured the new automotive wire would have been better.?!
by ZR800XC
August 15th, 2006, 3:10 pm
 
Forum: Vintage Sleds Board
Topic: ignition question...
Replies: 6
Views: 272

crankcase clearance?

NO. No pins, no O-rings, just a plain bearing.
by ZR800XC
July 7th, 2006, 3:25 pm
 
Forum: Vintage Sleds Board
Topic: crankcase clearance?
Replies: 3
Views: 245

crankcase clearance?

OK, OK...I need some input on a project, as my knowledge ends right here. I'm building a billet case for a 650 Kawi to possibly make a replica of Sam Sessions 75 PDC Kalamzoo Racer. ANYWAY, it's all done except the bearing surface for the crank. Given a bearing's size, what size do I need to bore th...
by ZR800XC
July 6th, 2006, 2:47 pm
 
Forum: Vintage Sleds Board
Topic: crankcase clearance?
Replies: 3
Views: 245

boysen Rad Valve

you probably won't even notice a difference. I used to race CRs, had a 250 and a 500 in 97. None of that******made made them run better really. I even used Pro Circuit Work Pipes on all my bikes. pretty much only because they looked cool! Did nothing on the 500, made the 250 have a little broader po...
by ZR800XC
June 29th, 2006, 11:44 am
 
Forum: Vintage Sleds Board
Topic: boysen Rad Valve
Replies: 3
Views: 272

mod questions

Get it running good without the turbo on it first. This will give you a good baseline. When you build your pressurized intake box that mounts to the carbs, you're going to have to vent the carb float bowls into this box. This way, as the pressure in the carb venturi increases, the float bowl pressur...
by ZR800XC
June 12th, 2006, 10:43 am
 
Forum: Vintage Sleds Board
Topic: mod questions
Replies: 1
Views: 262

another summer restoration update for ya fellers

These are the 71 Magnums we took to St Germain this weekend for the Snowmobile Hall of Fame show. The 600 was just finished up Friday night before we left. Could still smell the paint!!

[img]http://my.core.com/~twister76/IMG_0633.JPG[/img]
by ZR800XC
May 30th, 2006, 12:02 pm
 
Forum: Vintage Sleds Board
Topic: another summer restoration update for ya fellers
Replies: 3
Views: 229

Memorial day: SKOL! everything red white and blue!!

Freakin' concrete guy....!!!LOL 'Course, I'd pass by a few Polaris' to check out a pour too, I guess! :W
by ZR800XC
May 30th, 2006, 11:57 am
 
Forum: Vintage Sleds Board
Topic: Memorial day: SKOL! everything red white and blue!!
Replies: 2
Views: 160

Latest Moto-Ski restoration..

I pour concrete...foundations and floors!!!

Sled buyin has slowed down since I built a house...but I bought this Moto Ski for myself for X-mas this year!!
by ZR800XC
April 28th, 2006, 3:03 pm
 
Forum: Vintage Sleds Board
Topic: Latest Moto-Ski restoration..
Replies: 15
Views: 2274

questions about porting

Well some builders believe that a fine rough texture provides a thin layer of turbulance on the edges of the port. Each scratch makes it's own vortex, and thus lets the rest of the fuel/air mix pass right by. Kinda like in the back of a pick-up truck...when your tail gate is up is makes a vortex of ...
by ZR800XC
April 26th, 2006, 1:10 pm
 
Forum: Vintage Sleds Board
Topic: questions about porting
Replies: 18
Views: 1644

questions about porting

Just to kinda add in here some tips for exhaust port shaping. You'll notice the exhaust port is angled down. When shaping the top of the exhaust port you'r going to want to remove only enough material to keep that downward angle. You don't want to cut into the roof a whole bunch if you're keeping a ...
by ZR800XC
April 25th, 2006, 3:18 pm
 
Forum: Vintage Sleds Board
Topic: questions about porting
Replies: 18
Views: 1644
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