Tips and Tricks For Measuring Your Top End Right (Honda CR125)

[@chrisdupree755]

Keep doing what your doing. We all appreciate your videos. You made my bottom end rebuild tolerable !! Thank you

[@brian.d.mobley]

Oh man! Thanks Chris! You made my day! It makes all the time consuming work tolerable when someone like you is nice enough to let me know I help them. Thank you! And thanks for watching. I have a cool video coming out in a few days on something a little different; carbon fiber repair! I do a lot of composites work but this is my first video about it. Take a look at it when it comes out if you have time!

[@Kobwo1]

Excellent info. Thanks for your time

[@brian.d.mobley]

@kobwo1 So glad it helped you! Thanks for the nice comment!

[@anthonysupplee858]

These videos are very helpful. Leave a comment if you appreciate these vvids

[@itsmeitsdrew]

love the vid - what if we dont have a service manual :D

[@brian.d.mobley]

HI ItsMeltsDrew! I have found that you can find a manual online for just about anything. If you have trouble, join some facebook groups related to the vehicle in question and ask the members. You will be able to find one, Ill bet!

[@itsmeitsdrew]

@@brian.d.mobley haha i believe that! my biggest issue is this is a cheap chinese atv from who knows where/what year i picked up for my son and i to try and rebuild - something for us to tinker on together. havent had any luck identifying it

[@brian.d.mobley]

@@itsmeitsdrew Due to my low threshold for frustration, I don't buy any of that Chinese motorcycle stuff! Its always a zillion headaches and I just don't cope well with things that are poorly made. Best of luck though!

[@itsmeitsdrew]

@@brian.d.mobley haha!! i think im currently learning my lesson! Trying to perfect a meal without a recipe is always fun - thanks man!

[@250race]

So .03 to .05 is the limit for the Is clearance of the bore. If it's at .06 bigger we should use the next size piston?

[@zachdavis2641]

I have an all original 2001 cr125R that my dad bought new June 2001. He rode it maybe 20 min at a time a few times a year when he had it. He did not ride it much. Maybe less than 25 hr total upon the time he sold it in 2008. It went to 2 owners since and last owner had it for 10 years with minimal use. Just bought it back this past June. Engine still looks original and runs fine. Pipe has a dent that will need fixing and re cerekoting. Other than that it’s visually almost perfect. I just know these 2 strokes need top end overhauls pretty often. 50 hrs? It’s probably getting close to that mark. I would do Oem top end, maybe crank seals, and clutch plates as clutch lever engages with maybe 20 % left in lever movement. Anything else to check? Reeds?

[@JD-hr1ct]

If it meets the diameter specifications, how many burn and scratch marks are ok before needing to replace the cylinder?

[@brian.d.mobley]

There is no specific number, but if a gouge is deep enough to snag your fingernail, the cylinder needs service or replacement

[@paulmurphy2503]

PLEASE DO A CR 85 CRANK SEAL REPLACEMENT ON THE CLUTCH SIDE

[@brian.d.mobley]

I’m surprised you missed that one. But, I’ve already done that! Check this video. kzbin.info/www/bejne/e6a7lmujhsiXp80

[@garypalermo3511]

Hey Brian, have a 1987 CR 125. same proceedure while specs may be diff? Thanks

[@jonathandavis9874]

Do I need to check the squish when putting a new piston/ring in top end for maintenance? No other engine work done. Thanks

[@brian.d.mobley]

In a word, no. As long as the cylinder and/or head have not been resurfaced, the squish is basically set. The only thing that could cause this to vary would be the thickness of the head/cylinder gaskets and those are standardized if you got your gasket from a "normal" part supply source.

[@joelarambula9767]

I need to rebuild my cr125 is a 1988 , where I can get a rebuild kit?

[@brian.d.mobley]

Hi Joel! Im not a big fan of rebuild kits but, you could try Wrench Rabbit. Nowadays, I usually buy the individual parts needed for a rebuild from some retailer likes Rocky Mountain ATV or Motosport.

[@tristanhodges5144]

Where can I get this tool kit

[@bullrunllc1685]

Your videos are top quality your channel will do great im sure of it. if i could spam the 👍 button i would thanks

[@brian.d.mobley]

You are the best!

[@dylandiaz6623]

and the next thing I did was to rectify the cylinder head, retify the cylinder, replace the radiator and the bonba works perfect and anyway I accumulate many pressures in the entire hose .... now I have determined where the problem will be

[@brian.d.mobley]

Good work! I’m glad you could figure that out!

[@dylandiaz6623]

@@brian.d.mobley So what do I do in that case to regulate it?

[@brian.d.mobley]

@@dylandiaz6623 Check the water pump. That’s probably the issue. Or the radiator cap

[@dylandiaz6623]

brother, I have a Suzuki RM85cc year 2003 that heats up too much and it is breaking me in the rim of the cylinder and it turns off xk the anti-slip is filtered for the cylinder