I ran a different plug in my motor,and it leaked. Murnan was right there with me and said (you must run a Ninja plug ) I didn't know just got the motor. And as for being cheap,nothing in this hobby is cheap

Hey what's up D-man this is D.J. I just picked up 2 ninja plugs for my 21 R01A
,,,they def are not cheap $10.39 a plug. I would rather spend the extra cash to have the right plug though. O yea,,I didnt tell ya yet but I picked up a MRX-4R

Looks like they are almost the same, but not exactly. Pictures taken with the head from my murnan ninja mr12, a brand new ninja c7 plug and a brand new novarossi c5tf plug.





Ninja plug:



Nova plug:



The ninja plug seems to sit a bit lower and it also has a different shape then the nova. The tapers seem to be the same angle, but the nova seems to have a bit more of it, causing it to stick out a bit compared to the ninja. The ninjas shape looks like it would help a bit with igniting fuel, maybe smooth out the flow. Looks like you can use the nova, but it is _NOT_ the same and I have no idea how it would change the motors performance, and it probably does in some way.

on a side note, looks like i have some damage where the head meets the plug. should I be concerned? Any idea how that happened? maybe I overtightened it or something, I can see that happening. I hope its not from detonation or something like that.

Pulled from the CD-ROM:

WARRANTY
This engine has been produced using high technology materials and maximum precision machines. However, you have to consider that the severe conditions prevailing during competitions and the use of fuel containing increasing quantities of nitromethane constitute situations that cannot be controlled by the manufacturer.
We therefore regret that we cannot extend our normal warranty conditions to this engine.

Therefore, if you want to run a Fox plug, go right ahead. HOWEVER, if you want the engine to run well, I'd stick with the Ninja plugs. I'll just get a 5 pack (which is like 2 gallons of fuel) and call it a day.

at least a speach saying 'there is no warranty, run engine at your own peril' would of been better then that contradicting story...

then again having been involved in a few different forms of racing i've never heard of warranty for racing products especially on the engine side of things, unless they were un-used and yet to have a drop of fuel, and you find somthing serious.

These plugs are very high quality and need not be changed every race. Including breakin I have used two plugs the third one is in the engine and I am just about to finish my sixth gallon of fuel.

Where are you guys buying your ninja plugs at? I see nitrohouse has them but only cold? who's running cold?

I've bought them from Amain Hobbies.

Thank you.

I am gonna start runnin a Ninja in my MRX4-R this season. I have seen most of the guys at my track runnin there Ninja's at 300+ degrees. Does that sound right, cause I was runnin my Rody and my Collari at around 250 max?!

yes that is correct, i was helping 1/8 scale this past weekend ,he started his qualifier at 280 and finished at around 310. run great smoked the whole time.

A friend of mine has some Qs regarding the NINJA fast link setup.
Can anyone LMK how are they if they've used em?

hot pics!

I've used the FLS on-road exhausts for my .21 Ninja's they work very well, my only advice is to renew the o rings when you change manifold. We had no problems with any leaks. A very good exhaust system.