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That #5 part is an option between two different styles of gears. The one up and to the right is an older obsolete gear and the one that you had in your engine is the one connected to the crank itself.
You got lucky the engine internals are all good! You have a couple options here. First you can replace the plastic balance gears with more plastic gears, I have a new set I need to get rid of that I can let go for $20.
If you plan on racing you need to upgrade the clutch.
The new style clutch kit which comes with new steel gears is $524.48Or if you don’t plan on racing you can just swap over to the steel gears which are $48.64ea
I would assume there could be some damage to the other gears in the case. They only run the larger two gears as steel and the other 3 remain plastic. I have never had a failure in the balance gear case with the new gears. Check the other 3 gears for damage and see which ones you will need.
It could be a blown main seal, or a soft stick on the top end. I would say the top end failure is more likely as I don’t see them really ever blow seals. Pop the pipe off and look at the back of the piston, and that will tell you if it needs a rebuild.
Well I think it really depends on which direction Honda wants to go. They are the only guys who currently are making and supporting CR125 engines and parts. It really is up to them if they want to kill the parts supply and switch us to CRFs. I’m thinking about selling my CR125 engine while it is still worth more than $500…
I haven’t seen one that has blown a reed cage, but pulling the exhaust and checking the back side of the piston would be good. Hopefully it is something simple like a fuel pump, or a plugged carb. Sometimes when they seem like they are getting fuel they actually aren’t. Post back with your findings and let us know. There are also a few Rotax Service Centers here in town that can help you out, including us here at Unser. Feel free to bring it by the shop if you can’t get it figured out.
Considering people already spend that on CR125s, and you get a modern engine that is fuel injected I see no downside. I like that honda actually put this together, and unlike the CR125 you can buy an assembled engine from Honda. One cool side note is they adapted the output shaft to accept the CR125 gears and chains everyone already has.
Sadly I’ll be at Supernats instead of this. Can’t tell you who yet, but a karter from CA we all know just might be racing a support class at this event!
@stacey cook wrote:
I also feel that if Rotax was a part of the regional series that it would really help the Tag class entries. The shifter classes are some of the best racing I have ever seen already. Colorado and Utah have some of the best shifter pilots in the country and have proven that over and over again.
Well said Stacey. The Rotax Senior/Masters guys already can race Skusa with only a change to MG White tires and I believe masters may have a weight change. If we come out with a schedule that works a little better for the Denver guys (1 or 2 races over here, 4-5 race series) then maybe they will race it. RMPKC does need to add the Rotax to the TaG junior class as a local option, and offer the spot for Vegas regardless of the local engine. Guys would rent an engine for Vegas if it came to it, but they are not going to buy a leopard just to try Skusa out.
Thanks for reaching out to us Eddy! Should be a pretty fun race and hopefully we can come home with some prize money. We will have to set up some informal late year racing weather permitting.
Rick, I want to see that video! Maybe you can post it on youtube? Can’t hurt to have one of my more “embarrassing” driver mistakes all over the web.
Awesome. With all the people coming in from out of town to prep for Pan Am it would be good to have a strong CO showing.
