Top end rebuild??

[sickKLT20081]

I have a '93 Blaster, and I was wondering if I should rebuild the top end, because I don't think it ever has, and my buddies '91 300 Foreman S is never too far behind me. I thought i should smoke him, but over about a mile and half, I wasn't anymore than 200 yards in front of him, and I got waxed by a '89 Suziki 250 bike. So how much would it cost and would it be worth it to rebuild the top end?

[TheOlderFox]

Check your compression. If you are within the acceptable range, there is no need for a rebuild. Your bike may just not be as fast as you thought it was to start of with.....

[hondaATCman]

I have a '93 Blaster, and I was wondering if I should rebuild the top end, because I don't think it ever has, and my buddies '91 300 Foreman S is never too far behind me. I thought i should smoke him, but over about a mile and half, I wasn't anymore than 200 yards in front of him, and I got waxed by a '89 Suziki 250 bike. So how much would it cost and would it be worth it to rebuild the top end?

Well, if you have an 11 year old 2-stroke that has been ridden hard and on a daily basis, chances are you need a good overhaul. Also, that would be a '91 300 Fourtrax you are talking about, and actually the 2x4 models were relatively fast for a utility. And if you can beat a later model ('87 and up) Suzuki 250 Quadracer with a Blaster, there's something wrong with the Quadracer. :D

Oh yeah, almost forgot... if you are wanting to do a nice, well-done rebuild, I would recommend getting the cylinder bored to the NEXT available size, don't get it bored to the max as this will only gain a slight increase in cc's but will make the cylinder walls very thin, which in return will eventually crack the cylinder due to heat (even worse on an air-cooled). So if you want to do it right...get a fresh new bore, piston and rings, top-end gasket set, and I would also recommend some new reeds. If you have stock reeds, they are bound to be cracked and warped.

Bore: $50-$75 for a good one (including hone)
Piston and rings: around $90
Gasket set: around $20-$30
Good set of aftermarket reeds: $30-$50
Spark plug: $3

[sickKLT20081]

Also, that would be a '91 300 Fourtrax you are talking about, and actually the 2x4 models were relatively fast for a utility.

It is a 4x4 Foreman, and does about 48 - 50 mph

Oh yeah, almost forgot... if you are wanting to do a nice, well-done rebuild, I would recommend getting the cylinder bored to the NEXT available size, don't get it bored to the max as this will only gain a slight increase in cc's but will make the cylinder walls very thin, which in return will eventually crack the cylinder due to heat (even worse on an air-cooled). So if you want to do it right...get a fresh new bore, piston and rings, top-end gasket set, and I would also recommend some new reeds. If you have stock reeds, they are bound to be cracked and warped.

Bore: $50-$75 for a good one (including hone)
Piston and rings: around $90
Gasket set: around $20-$30
Good set of aftermarket reeds: $30-$50
Spark plug: $3[/QUOTE]

Is there any slighter cheeper way, I bought the quad for $300, and have put in about $300 and was just looking if it would be worth it

[Wickedfinger]

How the hell did you get this :
And if you can beat a later model ('87 and up) Suzuki 250 Quadracer with a Blaster, there's something wrong with the Quadracer. out of this:
I got waxed by a '89 Suziki 250 bike

... anyway - like has been said - take the top end apart (15min job) and if the bore dosent look too bad, order a .10 or .20 over Wiseco piston kit from whoever along with a new set of topend gaskets. When the piston comes in - take it and the Jug over to a recomended machine shop (ask your local bike shop who they use) and point to the jug and new piston (you won't even have to say a word). At this point they will probably say "ok - $40". I would also inquire about porting - if they do it, how much to at least match up the new piston - or - go to a full trail job. What ever happens next - pick up the jug and piston, if they havn't put on a cross hatch prep hone, do so, then put it all back together (30 min job max). Costs - Piston kit w/ rings, needle bearing and clips - $85 - $100, borejob - $40 - $60, Gasket kit - $25. Optional porting - $200 - $250.

[hondaATCman]

It is a 4x4 Foreman, and does about 48 - 50 mph

The Foreman series wasn't out in '91, it was still the Fourtrax, but hey, whatever.


Wickedfinger:
How the hell did you get this :

And if you can beat a later model ('87 and up) Suzuki 250 Quadracer with a Blaster, there's something wrong with the Quadracer.

out of this:

I got waxed by a '89 Suziki 250 bike

Woa, just realized that. My mind automatically assumed he was talking about the '89 Suzuki LT 250 Quadracer. I'm sorry, I guess I commited a crime. :rolleyes:

[Wickedfinger]

Woa, just realized that. My mind automatically assumed he was talking about the '89 Suzuki LT 250 Quadracer. I'm sorry, I guess I commited a crime.

Yes you did, a very serious one .... and your punishment is 50 miles of hard riding on the trike of your choice.

[hondaATCman]

Yes you did, a very serious one .... and your punishment is 50 miles of hard riding on the trike of your choice.

lol, hhhmmm...I think I'll pick my non-suspended 110 for that 50 miles!!