Torque on cylinder and head nuts cr125 Stock 99

[Michael Taksa]

Do you guys go by "feel", or are there specific numbers I shoulde torque to? I do know enough to not go round in circle and cross the pattern slowly. Stock 99 head and base gastkets.
Thank You.

[Randy Mckee]

20 ft lb

I do it by feel. You can get a torque wrench and try it to get a feel for 20 lbs, then take it back.

BTW: Cylinder (base) nuts are same torque.
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Randy
#123 TonyKart - S4 Stock Honda

[Michael Taksa]

Thank You.

[Michael Taksa]

Thank You.

[Cesar Rull]

As long as the gasket doesn't damaged this is something that can be take off on a regular basis to inspect wear without causing any damage to the engine?

Does the cylinder need to be TDB or something like that prior to opening it?

[John Matthews]

Only need to inspect if you overheat, run with the wrong mix, or suck something through that you think has damaged it. Otherwise just check torque at the intervals specified by your builder. Just looking at the cylinder if it's not damaged won't tell you anything, you have to measure.

On a 2 cycle there's no valve train so no, you can pull the head with the piston wherever you like. But, if you think you have a lot of carbon built up it might be good to do it at TDC so you can clean the piston without junk falling into the ports. It's not that big a deal to change the ring yourself (which involves pulling the cylinder) but if your builder is close you'll probably be better off having them do it since they know the process and have the right parts.

Most builders prefer their customers not to work on the engine since they're more likely to mess something up than fix anything. Your builder can tell you approximately how many hours, or races to expect from the ring, bearing, lower end, etc. Follow their guidelines and you'll be more likely to have a good experience.

Cheers,
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John Matthews
Heartbeat Power, LLC.

[Cesar Rull]

thanks John