Originally Posted by Mazda614
I recently ran in a new MR Ninja .12 that I purchased some 18 months ago. I am having heaps of trouble tuning this engine. I haven't been able to find the basic factory settings - nothing on the CD. The idle seems to stay high and then drop down, I have played around with both LSN & HSN and can't seem to get a good tune that holds.
The engine also appears to lack bottom end grunt compared to say my OS Speed Spec II. I am using the Ninja pipe that came in the engine kit.
Anyone out there had one of these and how did you find the tuning and overall performance of the engine.
I am contemplating having the engine worked up to improve it's performance.. is this worth it?
Bro, i when to check my needle setting for u.
- idm t6 plug
- 0.3mm shim
- 16% sidewinder fuel
- HSN 3 1/8 turn from close position
- LSN 3 1/2 turn from close position
- skyline pipe
This setting is what im using now... so far so gd... if u are using the ninja pipe, u can try lean a bit more. as i find ninja pipe run cooler then skyline pipe.
yape... u are right that this engine lack of bottom end, therefore inorder to improve it, you must tighten the clutch spring, to let it engage at a higher rpm. And this is a high rev engine... so change ur gear ratio to a higher one to bring out the power. DO REMEMBER to change the con-rod after break in, as ninja have a very tight p/s. Therefore the con-rod gone through high stress during break in. by changing rod can prevent serious damage and is worth to do that!
i personally find that this is a gd engine, very smooth running (when using ninja pipe) although i also very happy with mine using skyline pipe.