Thx guys but I'm talking performance. Next months I'm doing camshaft and high compression piston. I don't want to bore it bc that will make it run hot. And it has 4k miles. I picked it up as a repo for $2800.
What cams are you going to use? What ratio are you going to?
I wouldn't decide to stick with the stock bore just because you think it will run hotter. I don't know that increasing the bore will change the temps significantly in itself. If it was air-cooler it may be an issue.
Because you are going that far, I say - punch it out!
If you are looking for every last HP, try running Motul 5W or 10W-40 4T 300V oil. I've seen independent data that shows it will give you more. With the overall numbers the Ninja is making it won't be a huge increase, but it might give you something. That, and because you are running it hard 300V double Ester synthetic will give you some of the best protection available.
It's not cheap, but compared to everything else you are doing it's not expensive either.
I was going to say get tires before you do one more thing, but it looks like you did. Thank goodness - that tire that was on the front was a low-side waiting to happen.
Jay
Oh yea, and welcome!
