It buys and it installs one manic Mechanic High Comp. Billet Head from Pirate Cycle in my PK80 and my bike loss 10mi/hr. Some recommendation to improve its performance or used as ash tray on the table.
Well ya gotta give us a few more details, like whats the motor doing,whats the plug look like, how old is this motor, is it broke in yet,what carb. is on it, all stock PK80?????It buys and it installs one manic Mechanic High Comp. Billet Head from Pirate Cycle in my PK80 and my bike loss 10mi/hr. Some recommendation to improve its performance or used as ash tray on the table.
Big Boy,This is a relative new engine with less than 40hrs of used. This have a ported inlet and outlet with Walbro carb and Tuned Pipe. With the original slant head with double gasket (from fabric) using a BPR6IX spark plug run about 40 to 42 mi/h. When installing the Billed Head lost 10 mi/h.
Furament, K.i.p.it puts the lotion on its skin lol
http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf
If you look at the chart on this page you will see that the BPR prefix designates a 3/4" reach plug.
Like Jim says you have to make sure your head gasket fits over the lip on the nice billet head. I had to carefully grind out the head gasket hole. Remove the burrs carefully after you get it to fit . Bolt on--run it--let it cool--re-torque..While you're at it at least get a straight intake manifold..I`m sure you just need to tune your bike for the billet head....
Whenever you put a new/different part on your bike it will change the tune, sometimes....
EVERY part I`ve installed on my motor has changed it in one way or the other.... But I`ve been able to tune it back to a better running motor....Is it just not revving out to top speed, 4stroking at all, hestitation, or it`s just shutting down 10 mph before top speed.....
I`ll buy your billet head from you if you don`t like it anymore..ok....
These cyl. are the best IMO.....I've got 93 of them on the bench that are getting the final touches.
90 will go to Pirate cycles, the other three I'm keeping here for customer builds.
I made a custom tool this time to profile the squish band and chamber...it took a few more weeks to perfect the tool than I had anticipated, but in the long run it will save a ton of time... (4-days saved everytime I make 100).
The choice was to up the price, and do it the old way...or figure out a better way and keep the price the same.
Jim