All right, my mate has a ~2000 model EC250 2T which we have spent the last week getting running.. We were pretty damn happy once we got it to fire up after a bunch of tinkering and methodical elimination.

Anyways, after a few squirts my mate realized there was a very funny noise coming from the case, to which we have deduced is the main bearing. Disappointment. Being mechanically inclined (but never having torn down a bike) we got on the net to find a bottom end kit for his bike, to no avail.

So, after hearing that GasGas gains influence from other bike manufacturers we were hoping that there would be some possibility of another branded engine having the same or similar engine mounts, even if it'd need a bit of modification (my friend is a machinist and has a bunch of tools and skills at his disposal). Neither of us have any friends with other similarly aged 2 strokes so we have no way to look and see if they are similar to this one, so I was hoping someone on here would have any knowledge as to whether any other engines may fit, like a CR or KX or the like?

Also, to avoid an engine swap, if anyone knows of where we could get a top+bottom end kit sent to AUS then I'd totally appreciate that too!

tornaido_3927, on 14 April 2012 - 09:19 PM, said:

What do you mean 'bottom end kit'? If the crank is ok, then you can just replace the rod with a honda CR rod, which is a direct crossover. The bearings and seals are all off the shelf items from a bearing house. You just need someone to rebuild the crank as its not something I would recommend doing trying you know what you're doing.
Top end kits are easy to find on ebay and from AUS dealers like mainjet or scottys.

As for the swap, if you could do some measuring on a pre 2000s CR then you might be able to make it work, as that is what the engine was based off of originally.
Although the gasgas engine will be better for trail/enduro riding.

I assumed that to do a bottom end a bottom end kit is used, like how Wiseco market them on their site here..? Other than the crank, if it's fine, my mate can get any bearings and seals through his work but we just weren't sure if they were off the shelf or were specialized ones specific to Gas Gas..

It'd definitely be preferable to do that than swap an engine, but I'll try and measure an old CR engine if I come across one out of curiosity..

Thanks noobi!

what your describing is a standard bottom end rebuild,  it's not that expensive or difficult

One thing about a Gasser, they have very few unique motor parts, they are all from something else. So most of the parts are easy to come by.

Did TM still supply engines to GG in 00?

may also be worth checking..

tornaido_3927, on 15 April 2012 - 03:59 AM, said:

The wiseco bottom end kit includes a whole new crankshaft assembly, with the rod already installed. There are plenty of stories of the stock GG cranks doing 500-1000 hours with just good oil and regular servicing, its not very common they need replacing.
So like I said, if when you pull it apart, the crank halves are still ok, just take the main bearings and seals to your mate and get him to match them to some good quality off the shelf bearings and seals. If the old rod is a versah rod, then the part number is that off the CR rod which is easy to find.

Sweet that's pretty much all I needed to know, thanks heaps fellas! Appreciate it!

tornaido_3927, on 15 April 2012 - 05:34 PM, said:

http://www.gasgasrider.org/

CHILLY, on 15 April 2012 - 06:14 AM, said:

GasGas reminds me of the older International Scouts. They borrowed parts from everybody...put them together to make an oustanding offroad vehicle.

I think that's why I've grown to like them, an amalgamation of other brands' good ideas in one bike..