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Old 08-19-2010, 12:51 PM   #1
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Default mario rossi wht head ninja

does anybody has a piston/sleeve set up that comes with this engine or is there any rc store that has this across seas because i know theres no store here that has it somebody help me please
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Old 08-19-2010, 08:42 PM   #2
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does anybody has a piston/sleeve set up that comes with this engine or is there any rc store that has this across seas because i know theres no store here that has it somebody help me please
I believe that Novarossi parts will fit into that engine if you cant find the Ninja packaged stuff.
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Old 08-21-2010, 07:23 PM   #3
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does anybody has a piston/sleeve set up that comes with this engine or is there any rc store that has this across seas because i know theres no store here that has it somebody help me please
What Ninja your talking about MR 21
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Old 08-22-2010, 07:37 PM   #4
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yes mr21 tuned version with magnesium head
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Old 08-23-2010, 08:11 AM   #5
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yes mr21 tuned version with magnesium head
I have a sleeve for sale with only 7 tanks on it, The bearing gave way and killed the piston and I have a NEW in the box conrod for the MR21-R01 I want $60.00 for the conrod and make me an offer on the sleeve.
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Old 08-23-2010, 08:31 AM   #6
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Both MR21 R01 are the same It is the same block all that changed is the Magneisum head and the bearings are ceramic that is all that changed ask anyone.
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Old 08-23-2010, 08:34 AM   #7
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Novarossi won't fit, the crankpin is different (if I can remember right it is larger), maybe the rods of a RB will work. The piston pins are different so when building up you do need the rod beloning to the P/S set. I did fit a GRP set into a Novarossi engine and with using a NR rod I only needed to drill up the hole from the piston pin from 4mm up to 4.2mm

I know the early REDS racing models were based on GRP messurements or you have to look at the new Techonpower engines which actually are the GRP engines. Only no onroad P/S set but probbebly you only need to raise the exhaust port.

On the other hand, the time and costs is not worth it, getting a new engine seems to me like a better choice.
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Old 08-23-2010, 09:06 AM   #8
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what are the benefits of the magnesium head?
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Old 08-23-2010, 09:28 AM   #9
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what are the benefits of the magnesium head?
Magnesium is lighter so it will keep the center of gravity lower. The down side is magnesium does not disipate heat as well as allumunum.


I agree with Roelof. Just buy a new engine with a better supply of parts.


Pass you soon...
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Old 08-23-2010, 10:17 AM   #10
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Originally Posted by lil-bump View Post
Magnesium is lighter so it will keep the center of gravity lower. The down side is magnesium does not disipate heat as well as allumunum.


I agree with Roelof. Just buy a new engine with a better supply of parts.


Pass you soon...
+1 mugen and grp parts are getting harder to find I would go with a new block.
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Old 08-23-2010, 10:20 AM   #11
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Only other option is to get it pinched.
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Old 08-23-2010, 11:40 AM   #12
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Only other option is to get it pinched.
I told him I have a sleeve with 7 tanks I never got to hit the needles on the engine and the bearing went on the engine. It is an MR21 R01 sleeve.
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Old 08-23-2010, 11:45 AM   #13
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I have the MR21 R01 engine block with no rear bearing and no piston. I also have an GRP .21 tuneline on-road with no front bearing and no piston and no conrod.

Last edited by mugenize1; 08-24-2010 at 07:32 AM.
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