what can a blaster handle?

[swood]

I bought a used blaster.. fair shape its an 03. from what I see its all stock. except paddle tires..any way my daughter was riding in the sand with it , she is 11.....having a hard time getting her to change gears....so first was revede to the moon alot. then she wanted to ride in the side by side for awile so I was goofing on it ....and playing pretty hard and im not a small guy 230ish. any way we seizeding the motor after a long day.

so i want to know could it have been a tired engine? am I just to big to rip this bike around ( man its fun to wheelie) . what were the factory jet sizes? anything I can do to make it tougher? I dont need it fast just long life...well as best as a two stroke can be

 

[Awk08]

your weight wasn't a problem, revving to the moon spinning in the sand, with minimal airflow from the slow speeds could have been, riding in the loose sand is very hard on engines from what i hear ?
could have been an airleak, poor compression, worn piston causing piston slap, ect. ect.

if you could leakdown test it before tearing it down may pinpoint if that was a problem, so it can be corrected before it fries the new top end

the condition of the piston once removed could lead to some suggestions as to what happened ?

is it still running the oil injection ?
what oil were you using ?

let us know what mods are done to it, then check that main jet and report what ya find

blasters are very reliable with good fuel/oil, everything air tight, proper jetting and routine maintainence

 

[scotj77]

the factory jetting is a 230 main. if it has the airbox lid removed you need to be at a minimum of 250. I would assume this motor is not still in factory condition.(meaning it has been rebuilt before) You need to get a leakdown tester or build one. these little motors go through hell and if they aren't jetted correctly, or have an airleak they will blow up when ridden for long periods of time. also research how to "plug chop" your motor for proper jetting. Your size isn't what killed it. they seize when running lean

 

[scotj77]

your weight wasn't a problem, revving to the moon spinning in the sand, with minimal airflow from the slow speeds could have been, riding in the loose sand is very hard on engines from what i hear ?
could have been an airleak, poor compression, worn piston causing piston slap, ect. ect.

if you could leakdown test it before tearing it down may pinpoint if that was a problem, so it can be corrected before it fries the new top end

the condition of the piston once removed could lead to some suggestions as to what happened ?

is it still running the oil injection ?
what oil were you using ?

let us know what mods are done to it, then check that main jet and report what ya find

blasters are very reliable with good fuel/oil, everything air tight, proper jetting and routine maintainence

Finally beat me to the punch. lmao

 

[swood]

not my first two stroke.....I had a 250r for years then it was a 310...and well air cooled is new to me. just checking my bases....havent torn it down yet but the piston is stuck for sure....the kick start wont budge . leak down first....then tear down and I will check for proper jetting.

it is oil injected. it has the air box lid and a foam filter. its pretty much stock.

 

[swood]

well i built me tester.....pumped to seven pounds.... it dropped to five in about a minute.....guess its time for soap and water

 

[scotj77]

yep...................

 

[sporty982000]

atvs . my overall thoughts.


seems to me, most often, young kids like to hammer the atv, wheelies, over rev it. wait to long before shifting. Or riding up steep hills, pushing it, or spinning tires allot.


down the road, the crank and rod bearings take a beating , due to this. starts to create slop. that slop, speeds up the wear on the lower cylinder walls. causing slop. after a while. then that wear exceeds the limits and you have a lock up or piston breakage.

My last blaster, I just finished. The cylinder wall looked good, the piston and rings looked good. but looked on the inisde of the piston and there was a tiny crack in it from the cylinder wall, lower end, out of spec.

It was only .006 out of spec, that might seem like a small number, but it was enough to start cracking that piston.
And something for people to think about, you can still have good compression on a older motor, and have a issue like that and not know it.

Sporty

 

[best]

atvs . my overall thoughts.
seems to me, most often, young kids like to hammer the atv, wheelies, over rev it. wait to long before shifting. Or riding up steep hills, pushing it, or spinning tires allot.

down the road, the crank and rod bearings take a beating , due to this. starts to create slop. that slop, speeds up the wear on the lower cylinder walls. causing slop. after a while. then that wear exceeds the limits and you have a lock up or piston breakage.

<SOME SNIPPED>

Yamaha has done a lot to make the Blaster low reving and as damage proof as possible, but boys will be boys.
Neil just pulled one apart with an impossibly bent shift lever. How much force did it take to do THAT?

The right mods, plenty of mid-range torque and you don't need to rev the Dickens out of it.
You can idle and lug it up the hills.

 

[89blaster89]

i ride in the loose sand every year a few times a year and i ride it hard and rev it up high and ive been on the same WISECO top end for nearly 7 years now and my compression is at 150 as we speak, my jetting is perfect and theres not a single air leak and i always mix my gas perfect and use maxima 927 oil in it

 

[sporty982000]

i ride in the loose sand every year a few times a year and i ride it hard and rev it up high and ive been on the same WISECO top end for nearly 7 years now and my compression is at 150 as we speak, my jetting is perfect and theres not a single air leak and i always mix my gas perfect and use maxima 927 oil in it

Thats awesome. I mentioned the lower cylinder wall, because compression would likely not be effected by that wear.


Sporty