2.5 issue

[Sodripper]

I have a T Maxx with the TRX 2.5. The other day I decided to tear down the motor to have a look. I bought it used and wanted to see what kind of shape it was in. (Nothing else to do because its too fricken cold!! -5 ) The only thing I found that made me nervous was what I call a lot of play in the wrist pin / piston. The fit to the crank seemed fine. Is this why I have a lot of trouble tuning?? And why can't I find anyone that has the piston/sleeve in stock? For the price of the things I might as well just upgrade to the 3.3! Any thoughts?:\

 

[Zdragon71]

I would upgrade. Brand new 3.3 on ebay without carb for $90 and you can use the carb off your 2.5. They are the same carb.

 

[Sodripper]

Another newbie question. How about the ambient temp outside?? When is it too cold to run them?

 

[Zdragon71]

Anything below freezing or worse will cause issues trying to hold heat and a tune. Even wrapping the head you still have cold air coming into breather. I wont run mine if its below freezing outside. Just to keep from being aggravated with the lean issues.

 

[2revo1maxx]

I would seriously consider a new engine, but if your piston and sleeve are useable you could get just a rod for now.

 

[Sodripper]

Thanks for the input. But the slop is in the wrist pin and piston. The con rod is tight on the pin. Plan on upgrading anyway just not right now.

 

[Kyleb]

If you have a long cold season it would be a good idea to buy a engine just to use forthw colder temps. I know I won't run my picco in the winter..

 

[2revo1maxx]

So the wrist pin is sloppy where it goes through the piston? That's not good. The wrist pin itself should be fine.