Yeh, looks a little lean to me, the most important part to look at on a plug is not the outside, it's the inside at the bottom of the porcelain, the ring. Here is a very good read on plugs. NGK Here is a link referring to the mixture ring I was talking anout. Plugs Maybe these will help.

 

Here is the scoop. I spent the last few hours at the dealer tearing down our 400 only to find exactly what we all suspected.......a hole in the piston.

BUT.....come to find out, they had put a "BPR" plug in it instead of a "BR". The "P" stands for PROTRUDING. The bottom line is the plug was too long putting it too close to the piston........ = HOLE IN PISTON. I am still going to go up a jet size or two. I am also going to be going .020 over on the new piston because right now there is .012" clearance between a stock bore Wiesco piston and my cylinder after he honed it out today. So, he admitted that it was his mistake and is going to make it right.

I helped him tear it down so I could learn more about how the 2-strokes go together. Oh well, accidents happen, it will be better and faster after everything is put back together again now so all is well.

It did appear that the oil injection was working fine, so I am going to see how things go durring the remaining 5 months of my 6 month warrantee and decide then weather or not to lose the oin injection system.

Thanks for all your advice.

GregV

 

Greg,
Thats cool they admit theiur mistake and are going to take care of it. Have fun when youget it back..


RoostKing...

 

For those of you interested, here is a picture of the carnage...........

400 Piston

We jsut picked it up today. Ready to see what she can do...........after a proper break-in of course. [img]i/expressions/face-icon-small-wink.gif[/img]

 

No doubt about it, she was running LEAN!

 

Rick Ritter has the swaintech coated weisco pistons, they are worth the extra cash if you want it to last.