Any tricks on getting a stubborn sleeve out of a block without damaging the sleeve ?

Have to use heat.... set your toaster oven for 250 and give the engine a good 10 minutes to heat up...then use a clutchnut on the crankshaft and a plastic tie wrap thru the exhaust port....Many times castor oil residue glues the sleeve in place and requires a little heat to get loosened up

Thank u Maximo ! I have it halfway out but for sum reason the second half is really stuck,

Does anyone know if there is an aftermarket brand for this ceramic bearing? The size is 14x25.8x5. Asking for a friend of mine.

Thanks.

Is this the one your looking for, for the Keep Off 4?

https://www.amainhobbies.com/tko-14x...mr1223/p384904

I believe Avid has them also

piston and sleeve and rod

Manuals show the same #s for the mito7 and the bonita 7

Is this true ????????????

mine lacks a little comp Runs good but just looking to improve it Motor has

4 gls thu it Could pinch it but don,t know who to use ???

Suggestion please

thanks

Probably my fault from running the top end too lean but I tore my Elite 5 apart and noticed some of the plating looks worn through in a few spots around the transfer ports on the inside of the sleeve. The pinch zone is still good and has a nice shiny mirror finish and the engine still has good compression. But will this cause any problems?

I don't think so. Nova shows it as a 14x25.8x5 not 6.

If it's for a Keep Off 4 I'm pretty sure that's the right bearing. 14x25.8x5.7x4.7 are the actual dimensions, the outer race is 5.7mm, the inner race is 4.7mm.

Yes, is the same thing.

Thanks guys. Apparently some of the (older?) manuals showed the wrong size.

whats the run time on a novarossi mito 4 with 9886 pipe and a 41001 header

Kind of a loaded question..... There are tons of things that play into run time. Ambient temp, humidity, fuel and nitro content, elevation, track conditions, drive train efficiency, clutch, carb inset, traction available with the correct tires installed on the car, pipe and header, and mostly how you drive it....


A fully broken in motor properly tuned for the weather and location, with the correct pipe and clutch on a car with the correct set-up, driven smoothly ( like most pro drivers) should make around 10 minutes. The same set-up with a normal person, will probably be around 8 1/2-9 minutes. All things being equal, minus the driver that is..


It would be safe to say 8-9 minutes.

Looking to get a new engine soon for my MP9 and wanted to see everyone's opinion on the following choices:

Rex Legend 4
Rex Legend 7
PLUS .21-4BTT/A
BONITO .21-7XLB

I currently have the following pipes to go with them:
werks 2058
Novarossi 9901/41019

if the 41019 is not suited, which manifold should I get?