I can get Ninja parts very easy from our local Australian distributor and from Japan. I find that parts are cheaper than other italian mills.
Any way, The GRP engine line will be the very similar so I would say parts would be interchangeable.

PS I have been very happy with the Ninja engine line, because of Ninja pricing I have and a few other club members have made the jump to 1/8 on road.

Maybe for outside the US, but not here. I got an email from a RC supplier stating the P/S set was back in stock and ready for shipping. I went to the website the same day, and guess what, it was out of stock, again! The same day they were in stock! Thats why I sold Ninja. The compression was getting weak, so I had it resized and sold it. As for GRP versus say Novarossi or Axe Rossi, the GRP is more money IMO. P/S for GRP is low priced in the US for 129.95. While for an Axe Rossi Mamba or Cobra, they can be found for $99-$104, and the P5 P/S can be found at times for $99 on ebay and $125 regular price online. Thing is with the P5, is you can find JP Racing modded P/S/R for about $150-$160. That to me make them better deals. The Axe Rossi lines can be X1 EVO converted for $179-$195, add a discount code and they're less.

hey guys just bought a new rod for my mr12 to1a and wen i went to change it i compared it to the old 1 in the engine and noticed sum differences. the new one seems chunkier, it is a little thicker and where it joins te piston it seems bulkier, the base of it also seems a little larger.

i installed it and engine seems free although i havnt run the engine yet.. any ideas as to wether i should run it and what rod ive recieved??

thnks

i ran my ninja one seson, including break-in. what should i replace. and from where to get my parts

Replace the rod and check the bearings, if the engine is still running with good compression. If not, then you will need to check whether its worth rebuilding.

Call the nice people at nitrohouse for ninja parts. I'm sure they can help you Craig.

thanks dude

hey guys just bought a new rod for my mr12 to1a and wen i went to change it i compared it to the old 1 in the engine and noticed sum differences. the new one seems chunkier, it is a little thicker and where it joins te piston it seems bulkier, the base of it also seems a little larger.

i installed it and engine seems free although i havnt run the engine yet.. any ideas as to wether i should run it and what rod ive recieved??

thnks

If its the right part number then it should be fine. I don't think you can get the wrong Ninja rod for .12. There is only one. Sounds like they made changes for issues in the rod IMO.

Anyone know the size of the Rear Bearing of the .12 Ninja??? And where to get it online?

12 21 5 is the size if i can remember correctly
the number is 6801 and any other brand will fit
try os or traxxas or whatever brand if original ninja
can not be found.

anyone know if the os tz carb will fit the ninja .12 ?

Hey guys I have Sirio glow plugs available to me locally and Ninja ones are kinda scarse and expensive. Reading this thread it seems Sirio plugs fit correctly. My question is which Sirio plug have you guys been using? I am thinking of going with the Number 6 medium but there seem to be two types. Anyone have any expereince using these? I will be using them on a off-road Ninja 21 and 28 with 30% nitro.

This one:


or this one:


Thanks.

Hi all,

we will start with the GRP engine line and will carry all parts for it so you can rebuild your Ninja, most of the parts will fit.

Picco/MEGA is in some country good to get but here it's very hard.
so we hat to stop with Mega/Picco and now founded a brand who has stock.

so we have the GRP .21 Tuned Promo kit fo a low price is included inline pipe set and some gadgets

changing my conrod and rear bearing. any pointers?