XRS Motor rebuild??

[SHEFFY40]

XRS Motor rebuild question??Compression?

Hey guys i have a question for ya....i have the XRS (2006.5 prototype) that i bought at the end of the season in 2007.It had 1100 miles on it when i originally bought it and around the 2500 mile mark of last season i blew the motor(block went).Being a prototype it had no factory warranty but the shop said they would look after us for a year as we bought 2 used sleds from them.They ended up having a XP block in stock with about 500 km on it so they used my top end and had me back out riding the next day.My question is now that my top end has 2900 miles on it and the block only has about 1200 on it should i rebuild my top end??Im pretty new to sledding so any help would be greatly appreciated
thanks

 

[turboless terry]

If it was me I would put new pistons and rings in it. I always figured around 3000 miles on a 2 stroke. It could save you a cylinder. You could do a compression check.
I just had my 06 rev go down with 3100 miles on it. It had a slp performance kit on it. Went down the last ride in the spring. I was going to go through the motor anyway before this winter. I am not sure what went. My wife was riding it. It was idling when it went.

 

[SHEFFY40]

Thanks for the input

 

[SHEFFY40]

Compression check

So i had a compression check done on my motor and it came up 110 clutch side and 120 mag side....I know they are on the bit low side but i was hoping to get through one more season..any opinions?

 

[Zachmandu]

I'd top it....

You can pay a little now, or alot more later. It is always easier, faster, and cheaper to re-build an engine that is running, rather than to wait until it breaks. Right now you are going to be out a set of pistons, rings, wrist pin bearings, and gaskets. If you lose a ring, ring land or in the worst case scenario - a skirt, you may end up replacing jugs, crank, case, or a combination of everything. Parts have a finite life and after being work-hardened and stressed for so many hours, they WILL eventually fail, you just never know when. It is almost always without warning, and as luck would have it, usually in a place that is VERY inconveniant. For peace of mind, and to save money in the long run, I would top it now, while the bottom-end is still reasonably fresh.

 

[stalefish_132]

mine let loose like yours at 4600km, just gettign back today with new long block. i'd rip 'er apart and toss a set of pistons in it to be safe.

 

[cableguy]

sheffy go with the dual ringed pistons while your at it, i know a guy who might do it a little cheaper than the dealer also call me

 

[SHEFFY40]

Anybody else??

 

[SHEFFY40]

Decided on doing pistons and rings for the price difference of only the rings(300)