Engine Rebuild

[KyleQ]

New here - been searching this great community for some time and I'm a little overwhelmed with all the information available here.

I just picked up my first Blaster, my first 2 stroke as well. The motor is friend in this thing - the previous owner had the engine fail, took out the piston, sanded the jug and put it back together and had it fry again. I think the rings are melted into the piston

I'd like to get this thing up and running - not sure which direction to go. I'm thinking I can replace the jug, toss in a new piston and bolt the head on and go - right?


While I've got the engine apart - best bang for the buck upgrades to make?

Thanks,

Kyle

 

[blaster_pro]

u can get a wiseco prolite piston they work really well,vitos +3mm stroker kit

 

[KyleQ]

I'll look into that - I need a new jug, this a good builder?
1996~1998 Yamaha Blaster Cylinder and piston : eBay Motors (item 290401025608 end time Feb-16-10 12:46:53 PST)

 

[Blasterdude27]

New here - been searching this great community for some time and I'm a little overwhelmed with all the information available here.

I just picked up my first Blaster, my first 2 stroke as well. The motor is friend in this thing - the previous owner had the engine fail, took out the piston, sanded the jug and put it back together and had it fry again. I think the rings are melted into the piston

I'd like to get this thing up and running - not sure which direction to go. I'm thinking I can replace the jug, toss in a new piston and bolt the head on and go - right?


While I've got the engine apart - best bang for the buck upgrades to make?

Thanks,

Kyle

Welcome to the forum! Weres that guy live? I'd like to slap him around.. my god thats almost the stupidest thing I've heard..

anyways do you know what overbore the bore is at now? you can get the jug bored a size over, that will give you a fresh start, just get a new piston and your good to go.

As for upgrades you can have the head milled/ re-chambered, and the jug ported, thats the best bang for your buck.

 

[stephen12091985]

I'll look into that - I need a new jug, this a good builder?
1996~1998 Yamaha Blaster Cylinder and piston : eBay Motors (item 290401025608 end time Feb-16-10 12:46:53 PST)

try to find one clostest to stock as possible which is 66mm

 

[KyleQ]

try to find one clostest to stock as possible which is 66mm

Ok - I'll look around

The Blaster has some nice parts on it and a custom lengthened swing arm - after-market rear disk brakes and newer tires. Can't wait to take this thing out for a spin.

 

[blasterfreek30]

welcome to the forum man.......lets see some pics

 

[KyleQ]

welcome to the forum man.......lets see some pics

Thanks - I'll take some when I get home tonight. I'm mostly into the big 4x4 stuff right now, so I've got this little Blaster that looks like a ton of fun and I hate knowing nothing about it at all :-/

Here is my other toy -

 

[blasterfreek30]

Thanks - I'll take some when I get home tonight. I'm mostly into the big 4x4 stuff right now, so I've got this little Blaster that looks like a ton of fun and I hate knowing nothing about it at all :-/

Here is my other toy -

wow man nice crawler....

 

[KyleQ]

I took some pics tonight - I'll post in the intro section as well

 

[trevorman210]

gust buy a jug then buy a new piston an u will be ready to go. p.s blaster looks sweet

 

[sr5bidder]

the PO sound like a real bright guy sanding the cylinder and all.
holly sh*t batman are you putting your crawer wheels on the back of that!!!

you should find an old kx500 or cr500 engine to go in that dragster

 

[KyleQ]

Hehe - I might look for some larger tires for some more clearance and traction. It seems to have quite a bit of suspension travel - I plan on jumping this thing, but a 6'2" 300lbs I may have a fistacuff with gravity

 

[sr5bidder]

hmmm jumping may not be a good idea big feller look up frame gusetting and that extended swinger puts alot of additional leverage on the shock

 

[YZ Otis]

Welcome. Which ever way you decide to go, top ends are easy to do on Blasters. That's not the right swing arm for jumping even if you're 5'4" & 120lbs. You'd be better off with a stock arm or a stout well built +3 or +4 arm. IMHO Keep us posted with pix.

 

[KyleQ]

hmmm jumping may not be a good idea big feller look up frame gusetting and that extended swinger puts alot of additional leverage on the shock

Oh I can do that - I've got a 220mig, plasma cutter, hydro tube bender, power coater with oven, hvlp paint gun and a ton of steel.

I figure when I tear the motor out I can pull more crap off and shoot some paint on it - brace the frame at every joint as well.

 

[sr5bidder]

dude you got alot of stuff I'm envious of you, for fabbing I have a vice,dremel, grinder and drill ...oh and a hammer .no welder and for steel I hunt around at work. do you think you could extend my swinger for less than $100 yb wants a-arms but wont tade for extension job

 

[J4M1E333]

yeah that swinger loooks way long, how long is it?
with your fabbing stuff i would def check that swingarm and reinforce it if necassary, if the jack ass that sanded the cylinder did it who knows when its going to take a crap on you

 

[KyleQ]

yeah that swinger loooks way long, how long is it?
with your fabbing stuff i would def check that swingarm and reinforce it if necassary, if the jack ass that sanded the cylinder did it who knows when its going to take a crap on you

I'll measure that thing tonight - I'm not too worried about it, if it folds I can easily build another one.

 

[KyleQ]

Wow I forgot about this project. Had a buddy chuck the cylinder up in his lathe and spin it up and bore it out - it's now 68mm. Hope to have ot back together, but I just got my Atlas 2 transfer case for the Bronco.