ok guys heres the deal...just picked up a 2000 blaster for 400 bucks it needed a topend I took the cylinder in and the guy said it needed honed got that done and a new piston,rings etc. got it running with about a 2 hour break in cycle then while riding the otherday I heard what I think was piston slap then it began to run real bad n it stalled n never got it started again took it apart and the piston was pretty burnt up and the cylinder was pretty ugly....my question is what is my next step I plan to bore it out with a new top end but I want to also make it faster..its got stock exhaust(really want a different pipe and silencer but my budget is limited) I want to make this thing faster and still reliable any help is appreaciated and if anyone has parts for cheap or just dont want them please let me know im sorta desperate thanks guys
Need Help!
- Thread starter racerboy32
- Start date
What mods are done? what jets? Sounds like it ran lean or poor quality engine work was done... Or both.
did you do a leakdown test after you put it back together after new rings? Did the shop measure piston to bore clearance? What was it? What did the plug look like after it quit?
It could of been many things. Wrong piston clearance ,air leak,wrong jetting,piston rings installed wrong. Take the time to read up to get a better understanding of what should be done.you have to be careful dealing with small repair shops. A 2 stroke Blaster motor is not the same as a 4 stroke mower motor.
Blaner
Your Friendly South African Ambassador
since it is a new bike and you dont know its history, you need to start at beginning and inspect things, do a leak test when its back together and follow the correct break in procedure.
Performance wise, anything you do will be suffocated by the lack of an exhaust. however you could nail some porting, Boyeson Reeds, and perhaps a head mod if you really looking for power.
Performance wise, anything you do will be suffocated by the lack of an exhaust. however you could nail some porting, Boyeson Reeds, and perhaps a head mod if you really looking for power.
after taking a closer look I noticed the boot for tje carb was cracked and the plug was black im not sure wat jets and the only mods I notice are holes in airbox lid the oil injection is removed amd I premix 32:1 and the tors is removed also a different rear shock and flipped front wheels im new to small engines especially 2 strokes but I rlly want to learn n I do my best with hands on experiences so I guess this is a good chance thanks again n thanks for the speedy replies
like 7 said it could be a lot of things lean air/fuel mixture a crack in the rubbery part of the intake boot can do that over time. Hence the reason it blew before you had the work done. or as simple as a bad gasket any where in between there and the motor, (however unlikely) if the owner before you dident use all new top end gaskets. Wellllllll since you already got the head off I'd sudjest taking the cylinder off and pinch the top of the rod without the piston on since your gonna have to replace it (most likely) with your pointer finger or pinky cause the finger will fit snugly like the bearing only your gonna feel if it pull left or right if you go slowly, also looking to see if the rod wiggles even minutely side to side. Not up and down while at TDC Top Dead Center of full stroke. If it dosent then check the pin bearing in the piston and see if it wiggles up and down. But looking at the vid I'd say your bike ate the ring up a bit thus allowing that wiggle. Also look at where the rings are at cause the ball bearing lodged in the piston is at it's a marker as to where the gap in the piston ring is supposed to be. Also look to see if the rings were put in upside down every piston ring in existance should have a T for top stamped in it in the middle of it. Cause some are made with a rounded off edge to it. Last and finaly least with the cylinder off if it needs bored you can feel with the tips of your fingers in the cylinder mabey a quarter inch or more a groove if you feel it your gonna deed to bore it out some if not your gonna nead a hone to get the rings to seal up nicely. Also a break in typically consists of idle running for 30 minitues mid throttle for 20 min and 10 minitues of upper throttle changing the plug each time just to ensure your jetting correctly and that it will fire up without a hitch. Then after all that let it cool down for a day conservitly 6 hrs then leak down test it before and after aswell as a compression test afterwards a shure fire way to tell if your rings are sealing is if you get a spike in compression after you spray the wd40 in threw the spark plug hole about 6-10 kicks are needed or untill the needle on the guage stops mooving up. if the bike is still slugish after the break in only go about half throttle for about 30 minitues and do another compression test, that I just explained about. Do all of this and mabey a vid or 3 and your gonna fit in great arround here good luck.
/\ /\ /\ /\ Top marks for the write up.
Some very confusing points, and way too much information, some of it correct, some of it not quite right. Some of it quite wrong.
Break up the topics into sections and address them one at a time.
Some very confusing points, and way too much information, some of it correct, some of it not quite right. Some of it quite wrong.
Break up the topics into sections and address them one at a time.
1)Thanks I went to a high school/trade school for 2 years and did this kinda thing for 5 days a week on lawnmowers....... to small dirtbikes....and snomobiles and an ocassional blaster. I'm glad to see someone take notice that it pays off some.
2)I wrote this up at 1:30 in the morning so there might be 1 or 2 incosistancies.
3)Will do if he wants me to along with corrections i will
4)how was that, breaking it up, into little pieces, (chuckle)
1)Thanks I went to a high school/trade school for 2 years and did this kinda thing for 5 days a week on lawnmowers....... to small dirtbikes....and snomobiles and an ocassional blaster. I'm glad to see someone take notice that it pays off some.
2)I wrote this up at 1:30 in the morning so there might be 1 or 2 incosistancies.3)Will do if he wants me to along with corrections i will
4)how was that, breaking it up, into little pieces, (chuckle)
Hereby lays a problem!
I hate to say it but alot of the stuff yall aretalking about I really dont know anything about.....small block 350s are so much easier lol at least for me...anyoneon this site from around me? man it would be nice to find someone willing to show me a thing or two on the bikes
in all honesty guys I dont know the half of what you are talking about I is there anyone on here from lower michigan area that woudnt mind showing a complete idiot a thing or two about these things
Ok I'll make it simple
1) take you cylinder off the piston/bike
2) feel arround with your fingers at about 1 inch or so from the top/inside of the cylinder to feel if it has grooves. If it does it means you need to have your cylinder bored again.
3)let us know what you find I'll be here
1) take you cylinder off the piston/bike
2) feel arround with your fingers at about 1 inch or so from the top/inside of the cylinder to feel if it has grooves. If it does it means you need to have your cylinder bored again.
3)let us know what you find I'll be here
did so and yes I can feel grooves...ther not noticible by looking but I can deffinitly feel them...called around n I can get it bored for about 75 bucks
No matter what time you reply, one more keystroke for commas and periods would be stupendous and doesn't take that long.
But awesome write up, psssh, you could be an instructor someday. Most people can do, few people can teach. I only have one question, your break in procedure seems quite aggressive compared to others on here. Do you really hold it WOT for 10 minutes and half throttle for 20 minutes??? I'm no mechanic, but that sounds like your punishing the bearings. I've ridden a lot, open trails and mud pits, I've never been WFO for more than 1 - 2 minutes.
But awesome write up, psssh, you could be an instructor someday. Most people can do, few people can teach. I only have one question, your break in procedure seems quite aggressive compared to others on here. Do you really hold it WOT for 10 minutes and half throttle for 20 minutes??? I'm no mechanic, but that sounds like your punishing the bearings. I've ridden a lot, open trails and mud pits, I've never been WFO for more than 1 - 2 minutes.
Totally the wrong way to do a break in proceedure, more like a breaking proceedure,
Whats the jibberish all about in the magenta colour?
No I let the bike idle for 30min,Then low/mid throttle for 20min. Then mid to upper throttle for 10 min. Makeing the total break in process 1 hour. But in between I let it cool all the way down and or as much as possable. Then I check compression, and would also recomend doing a leakdown test before and after the breakin period just to see if anything has changed. But the spraying the wd40 in is a must because the oil will seal the rings up better and cause a jump in compression if there not sealing.
But yea thanks EZrider76 I took 2 years of it in trade/highschool at 16 and graduated at 18 with my regular diploma and trade school diploma and have been doing odd jobs for 2 almost 3 years now. With only like 2 complaints with like.... how do I know this is wrong from this and it's 95% of the time confusion cause they dident hear me quite right or they dident start up there motor right.
Well here's an example you know how most chainsaws you can just start up and not prime it and go to town on a tree I had my dad's buddy's chainsaw in so I cleaned out the carb and diaphram he goes to use it again and it wont start. So he calls me up telling me whats wrong, I say did you prime it and have the choke on him not having to before does this, it roars to life and later tells mt it's not even slugish any more.
But yea thanks EZrider76 I took 2 years of it in trade/highschool at 16 and graduated at 18 with my regular diploma and trade school diploma and have been doing odd jobs for 2 almost 3 years now. With only like 2 complaints with like.... how do I know this is wrong from this and it's 95% of the time confusion cause they dident hear me quite right or they dident start up there motor right.
Well here's an example you know how most chainsaws you can just start up and not prime it and go to town on a tree I had my dad's buddy's chainsaw in so I cleaned out the carb and diaphram he goes to use it again and it wont start. So he calls me up telling me whats wrong, I say did you prime it and have the choke on him not having to before does this, it roars to life and later tells mt it's not even slugish any more.
Totally and utterly wrong.
It takes the best part of 1 hour to complete the first heat cycle, it takes the motor around 30 mins to cool down.
I do believe in miracles but even Jesus Christ could not then ride 2 tanks of gas through at no more than 3/4 throttle, within the period of one hour.
I sit at my keyboard clenching my teeth, restraining my urge to tell you where I think your information is coming from.
If you insist on posting wrong information, I may just risk an infraction from the Moderators, by telling where I think it is coming from.X(
