ninjette.org - View Single Post - Sanity check before potentially replacing rings on a race bike

daverdfw · February 20th, 2020, 12:03 PM

I am about to acquire a 2017 Ninja 300 race bike. The owner has indicated it will need new rings as it started to smoke.

From what I know so far it has the Spears racing thinner head gasket and some undercut gears. Not sure what other goodies it has.

I have swapped crankcases on a newgen 250 before so I am not totally new to working on these motors.

My question is making sure I am going about this correctly.

1) Compression check to verify it is indeed rings, start dry test then wet test if number is low.

2) replace rings.

Is there anything else I could be missing? Any other suggestions of things to do/check before/after? Thanks!

February 20th, 2020, 12:03 PM	#1
daverdfw ninjette.org guru Name: David Location: Fort Worth,TX Join Date: Nov 2015 Motorcycle(s): 2009 Ninja 250 Posts: 386	Sanity check before potentially replacing rings on a race bike I am about to acquire a 2017 Ninja 300 race bike. The owner has indicated it will need new rings as it started to smoke. From what I know so far it has the Spears racing thinner head gasket and some undercut gears. Not sure what other goodies it has. I have swapped crankcases on a newgen 250 before so I am not totally new to working on these motors. My question is making sure I am going about this correctly. 1) Compression check to verify it is indeed rings, start dry test then wet test if number is low. 2) replace rings. Is there anything else I could be missing? Any other suggestions of things to do/check before/after? Thanks!