Chainsaw Repair

I believe I have run that partner.

I have both ported and non ported P70 and 7000+, P70 has the T-port the 7000/and plus do not. Plus is harder to start and I find No difference in power. My best one is a low hour P70 with T-port ported, it pulls with anything out there today!
K650/700 cylinder has larger ports and a wider intake track, is the best but NOT THE OPEN PORT Chinese, can't quite get a BOG outta the two I put together?? might be a timing issue but K series flywheels wont fit  chainsaw cases. lost interest in that combo decided to stick with P70's

Side note: my old small cooling fin 65cc Farmer ported (bridged intake/exguast) is just as fast if not faster than my ported P70's, I compared it many times!!!! has alot higher compression ratio and you feel it when you pull it over.

Duane

Hmmmmm??

When the P7000+ came out, they said there was a 15% power boost over the P7000, to 3.5 kW....

According to specs it wasn't 15%, but still over 10%, from 3.1 to 3.5 kW.

Just learning on these as we go. So correct me if I get something wrong.

In my past post here I stated 550 was 44mm bore and 36mm stroke.

I found a used partner P65 P+C on feebay that says 48mm bore. Closed port.

I would swear from looking at pics of the aftermarket ones I am seeing both closed and open port ones offered in these here. PARTNER K650 K700 650 700 says 50mm. 

partner p70 7000 50mm too?

Kevin, you got a pretty good eye for these, you'll have to point me to one of the closed port 50mm.  I was hoping someone would chime in with one they picked up that was good or to stay away from.

Does not have to be new, seems like earlier in this thread a guy mentioned the k650 jug had bigger ports, I really no nothing on these.  used 50mm would be good to, I agree, I am eyeing up that used 48mm, I believe he said that p65 jug was as fast as his 70?  I need to go back & look into what all was said exactly, I prolly got some of it wrong.  Just trying to find out if any of the aftermarket k650 are worth a hoot or not.  Any input is appreciated!