Any one have any tips for a machine shop to port my head? Any hot spots? Any one had their own shop do it? What did it do? Increase the mid or top?

 

I plan on doing it myself in a few weeks. It looks like there is quite a mismatch going from the intake to the intake port in the head. The bowl are could use some work. I also noticed the short side radius could use some work smoothing the transition. Other than that, just normal valve guide boss work and possibly some chamber work. i havent seen the chamber so I dont know if the valves are shrouded or not. I would expect most of the gain to be midrange and top end with some noticeable low end gain. Dont go hog wild and remove as little material as possible to maintain good low rpm air velocity.

 

I had precision motorcycle do mine. Its hard to tell in performance just becuse i had them do alot of other upgardes at the sametime. Ill pm you his number am sure he could give you some tips.

 

Thanks what his cost? I may send it to him!

 

It cost me 175.00 for the head porting.

 

That sounds like a fair price. Did he provide any before and after flow data? Does anyone have any before and after flow info on their ported heads?

 

No he did not but i have know the owner for several years.He known for his port work around my area. oh and he also did my intake as well. overall i think he did a great job! [img]i/expressions/face-icon-small-happy.gif[/img]

 

have anyone dynoed the bike before and after the head porting? i think i am going to the dyno tonight to see the diffence. my bike made 53.8hp before and i hopeing for a bigger number.

 

Hurycne, just take a finger nail file and have at it[img]i/expressions/face-icon-small-happy.gif[/img] I'll see if I can get a copy of my before and after flow test and get it to you.

 

Hurycne- looks like you might be the flagger on june 29th! LOL
Or be the pilot of Dusty's big bad 650?