PK80 Wildcat Ported from California Motorbikes is Garbage

[ImpulseRocket]

Considering what we start with for an engine...quality..ect., I think stuffing is way over rated in our application. The actual stuffing gains would have to be determined on a dyno to be realized.
There's many other things on the entire bicycle/engine that can be refined to help speed.

Here's a read-only thread...it's too old to post on...but covers some case pressure ratio and stuffing...

crankcase compression ratio

Using the painstakingly accurate method of determining the crankcase compression ratio I outline at http://www.dragonfly75.com/motorbike/PCR.html I discovered that my reed valved 55cc has a ratio of 1.2 and that a meager ratio of 1.11 is existent with my 48cc piston port engine. This ratio is...

motoredbikes.com

100% agree with everything said here. There are a lot of things people do with these engines because it works on other engines. *cough* boost bottles *cough*

 

[Deleted member 35519]

My piston was cracked I have went through 2 pistons and 4 sets of piston rings and dude won't help my situation out at all I can't even get him to return emails most of this time I have had my ported Wildcat since end of October still won't start and all he's done is sent me 1 replacement piston. The intakes were absolute trash dont know how that passed his hand inspection before sending out orders. I still waiting for a reply for an email from 1.5 weeks ago. I sent him an email telling him ive gone through 2 pistons and the rings and still can get it to start and all he said was what's ur fuel/oil mixture.

Text him.

 

[Deleted member 35519]

100% agree with everything said here. There are a lot of things people do with these engines because it works on other engines. *cough* boost bottles *cough*

I'm about 100% positive if you NOS'ed a ported Wildcat. Somebody will make a post about a hole in thier piston.