Blaster cr80 flat tracker

[undergroundart]

Our flat track season is over. My boy finished 3rd in oval and 3rd in tt. Its been a great year. We had real good turn outs at every race and lots of very fast kids. Now we have a few months to tear it down, give it a good cleaning and fix anything broken before the Ice racing season starts.

 

[bansheedave]

Awesome. Glad your kid had a blast. But who had more fun? You or your son? Lol glad it worked out and next year let's hope for a number 1 plate.

 

[harley1-5]

nice deal a winning hybrid

 

[jus_me]

First year racing and you pulled 3rd in both! I say that's a pretty darn good job. Congrats.

 

[undergroundart]

oh no, not first year racing. this is our 3rd full season. and our busiest season of racing. oldest boy 2nd in motocross (kx65). flat track 3rd oval (blaster) 3rd tt (blaster) 3rd tt (kx65) and 2nd in harescramble. youngest was 3rd in motocross (quad) flat track 4th (quad). and my wife flat tracked and finished 4th in tt (400ex)

 

[undergroundart]

racing starts in a month. getting the carb bored out and gonna play around with gearing, but I think we re pretty much ready.

 

[Blaaster]

Get the carb offset bored, it will perform to its maximum and will be easier to jet.

 

[undergroundart]

what do you mean by "offset"?

 

[undergroundart]

hate to see it go. but they kids wanna stick to just mx on dirt bikes. This thing is for sale if anyone is interested

 

[jvb]

what do you mean by "offset"?

Blaaster? Enlighten us please

 

[Blaaster]

Offset boring is setting the carb up in the lathe chuck so that when the boring takes place no material is removed from around the area where the fuel enters the air stream.

 

[jvb]

Offset boring is setting the carb up in the lathe chuck so that when the boring takes place no material is removed from around the area where the fuel enters the air stream.

Thanks Blaaster!

 

[Blaaster]

If one just reams out the hole to make it larger often the emulsion tube when fitted stands proud of the bored surface and adds an obstruction to airflow which may create eddy currents, and can marr fuel delivery.

 

[jvb]

If one just reams out the hole to make it larger often the emulsion tube when fitted stands proud of the bored surface and adds an obstruction to airflow which may create eddy currents, and can marr fuel delivery.

I've never bored carbs, just because fuel metering is a very precise thing, won't want to mess with that!
Thanks

 

[Blaaster]

Bore the guts out of the venturi, air speed decreases, makes for troublesome jetting.