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I am doing a complete rebuild on my 220. Sent off the head, carb, and crank to RB. So while I have it torn down, I was considering sending the cylinder to Fredette for porting (evidently RB doesn't offer porting).

Any thoughts on this? I wanna get the best performance I can out of the bike without losing any bottom end power. And I really don't want a gas guzzler than I can't get 30 miles out of a tank.

Would it not of been easier to have just sent your complete motor to Jeff & got him to rebuild it along with a port , head & carb mods ??

I have my 220 ported , a 36mm kx carb & head re-cut ...I asked for more power everywhere but I didn't want to loose my bottom end.... The end result is awesome, 40bhp measured on the dyno ( rear wheel ) I did have to fit a 10oz flywheel weight just to tame the hit ....it'll rip my mates 2015 ktm 200xc & I still get around 80 miles per tank grin:

cornishwrecker220 wrote:Would it not of been easier to have just sent your complete motor to Jeff & got him to rebuild it along with a port , head & carb mods ??

Looking back, yes it probably would have. But everyone on here spoke so highly of RB, I had already sort of made up my mind to go that way. Didn't think about the porting until I had already shipped the head, carb, and crank. Was really surprised to find out that RB didn't offer porting. WTH?

He runs a machine shop, not a motorcycle shop??

Wait until you ride it before getting the porting done. I found with the head and carb mod the thing rips. I've beat every 250 4t I've raced. I'm seriously thinking of getting a flywheel weight to calm this thing down.

Just cleanup the casting flaws and match the ports up and I think you will be happy.

port cleanup

jjavaman wrote:Wait until you ride it before getting the porting done. I found with the head and carb mod the thing rips. I've beat every 250 4t I've raced. I'm seriously thinking of getting a flywheel weight to calm this thing down.

That's probably a good idea. Just thought about having it done while I'm waiting to get the other parts back. Having it down for 3 weeks really sucks........and I sold my spare bike last month. Gonna have to be a wuss and ride in the RZR for the next couple of weeks.

I've got a 73 RD350 in quite good shape and a complete numbers matching 74 parts bike! Love me my 2t motorcycles!

Tedh98 wrote:Just cleanup the casting flaws and match the ports up and I think you will be happy.

port cleanup

Yup! That's what I did with my 220. The bike was good before but seemed to pick up some more top end after the rebuild and port clean up. I used small files to do the ports and I had it done in under 2 hours. Easy peasy!

SS109 wrote:

Tedh98 wrote:Just cleanup the casting flaws and match the ports up and I think you will be happy.

port cleanup

Yup! That's what I did with my 220. The bike was good before but seemed to pick up some more top end after the rebuild and port clean up. I used small files to do the ports and I had it done in under 2 hours. Easy peasy!

Thanks, good to know!