I contacted a guy on ebay about porting the head on my bike . He also said he can add +1 or +2 of stroke by doing a modification on the piston . Has anyone else had something like this done before? Any pros or cons with this ? reliability or clearance issues with the valve train ? thanks

 

Are you saying this guy can add to the stroke by adding to the piston?? All that will do is increase compression.....not stroke. The stroke is determined by the length of the connecting rod.
Increase rod length, increase stroke.

I wouldn't even attempt a conversion like this.

 

How on earth does the length of a connecting rod very the measured stroke of an engine?
You can have a connecting rod a mile long or 6" long on the same engine and it will have the same measured stroke.

To the OP:
If this guy told you that he is full of bovine feces.

 

I was looking for someone who does a stroker kit for a 350x other than powroll. I have heard bad things about powroll cranks. The email said +1 or +2 stroker we modify your piston + 6 stroker we modify the crank . I cant figure it out?

 

The ONLY way to add stroke is to put a longer stroke in the crankshaft. When you do this something has to get shorter in the rod/piston assembly. (Otherwise the piston would smack the bottom of the head on the upstroke or TDC.)

So you have 4 choices with a stroker crank:

#1 Get a shorter rod and use the stock piston.
#2 Get a custom piston with the wrist pin hole higher up on the piston and use the stock rod.
#3 Mod the stock piston to get the wrist pin hole higher up on the piston and use the stock rod.
#4 Put a spacer on the lower part of the jug.

People use 1 and 2 all the time in the automotive world. I have never heard of #3 but I guess someone could do it. (Even if they do it won't add stroke so I have no idea what they are talking about)
#4 is common to stroke some engines.

 

You are right. You explained what I meant to say. Forgive me in my old age.

 

In thought it would be option 3 . But that doesnt seem like it would be reliable . And on my 350x piston the wrist pin hole is just under the rings .

 

Please contact Kevin Herr at Herr Jugs Racing. He is a master engine builder and will be more than glad to help you or at least point you in the right direction

 

Herr Jugs ? I like it already .

 

Yeah, me too ! I got stroked at Herr Jugs.