new guy

[jsanders347]

Hello all, new guy here. My 01 blaster has been sitting in a barn for about 7 years now and I have decided to fix it for thr the girlfriend. Best I can remember the last time I rode it the bike died and would not fire. This was right after a bore, piston, rings and wrist pin. So I said F it and parked it. With that said when I rebuilt it I was 16 and didn't have a clue what I was doing but knew everything. Remember those days? I didn't gap the rings when I installed them and I'm sure there's other stuff I failed to do as well. I just got done removing the head, jug and piston expecting to find chewed up rings or something but everything looks brand new with the exception of some rust on the cylinder wall. There was a lot of carbon build up on the head where the spark plug is. I also didn't have a clue about jetting, so the bike never idled. If I remember right there is a 195 main (might be a 210?) In the carb lol and I don't remember what pilot is in it.

Sorry for the book guys but I believe in details. So blaster guru's, where should I start? New bore and piston? Definitely gonna clean the carb. My thinking is a compression issue due to me not gapping the rings. What do yall think?
Thanks fellas

 

[jsanders347]

And when I said wouldn't fire I meant it wouldn't start. It had spark and still does.

 

[Blaaster]

If I remember right there is a 195 main (might be a 210?) In the carb lol and I don't remember what pilot is in it.

Sorry for the book guys but I believe in details. So blaster guru's, where should I start? New bore and piston? Definitely gonna clean the carb. My thinking is a compression issue due to me not gapping the rings. What do yall think?
Thanks fellas

Way, way too small, stock jet is #230.

Pics would help to diagnose rings and piston and bore.

 

[jsanders347]

Way, way too small, stock jet is #230.

Pics would help to diagnose rings and piston and bore.

Thanks for the reply. Maybe the main was a 295 or 310. I remember it being quite large. What angle of the piston would you like? Do you want the rings removed from the piston?

 

[Blaaster]

Thanks for the reply. Maybe the main was a 295 or 310. I remember it being quite large. What angle of the piston would you like? Do you want the rings removed from the piston?[/QUOTE]

Crown, and exhaust side or front.

Leave rings on.

Pic of the bore would be good and the measurements of all.

 

[jsanders347]

 

[79 bronco]

Welcome!!!!!!!!!!

 

[jsanders347]

 

[jsanders347]

 

[jsanders347]

Welcome!!!!!!!!!!

thanks bubba


holy chit those pictures are huge!!!!!!!!!!

 

[jsanders347]

Thanks for the reply. Maybe the main was a 295 or 310. I remember it being quite large. What angle of the piston would you like? Do you want the rings removed from the piston?[/QUOTE]

Crown, and exhaust side or front.

Leave rings on.

Pic of the bore would be good and the measurements of all.

is everything there? sorry but i dont have calipers to measure the bore,

 

[OConnor Racing]

First off, welcome to the forum. Looks like you have a max bore cylinder and the last “builder” that did your work didn’t leave enough for honing. Take a look at the tool marks from the last bore. If it’s just a beater, hone the cylinder to get rid of the rust and ride it until the rings wear out. Long term is to replace the cylinder or get a sleeve installed in your jug.

 

[Blaaster]

Other than a little heat towards the exhaust edge, the piston looks fine, there seems to be a ring locating missing and one ring is in the wrong place and riding over the other one.

It does not look as if that piston came out of that bore, there are no corresponding wear marks that I can see.

When you rebuilt it did you just slap a new piston in there without cleaning or even honing.

In all my years, I have never seen a piston which shows no wear, come out of a bore which looks so poor.

 

[jsanders347]

First off, welcome to the forum. Looks like you have a max bore cylinder and the last “builder” that did your work didn’t leave enough for honing. Take a look at the tool marks from the last bore. If it’s just a beater, hone the cylinder to get rid of the rust and ride it until the rings wear out. Long term is to replace the cylinder or get a sleeve installed in your jug.

thanks for the welcome!

this is about the 3rd cylinder wall ive ever seen so i really dont know what im looking at but when i rebuilt it i do remember the guy saying it couldnt be bored again. it is gonna be somewhat of a beater but i would rather do it right the first time so i wont have to go through this again in a month. which would be the cheaper route? getting a sleeve pressed in or just buying a used jug?

im still curious as to why the bike shut down and wouldnt start back? i wish i would have done a compression test before i tore it down but i got ahead of myself. i dont see any sign from the top end of low compression though. what would yall do from this point?

 

[Blaaster]

I would be having the bore measured to make sure that it is not too sloppy for the piston.

If all is ok, clean all the carbon away, try to get some sort of cross hatching to the bore, then fit the piston and rebuild.

You should get a fair amount of life from it.

 

[jsanders347]

Other than a little heat towards the exhaust edge, the piston looks fine, there seems to be a ring locating missing and one ring is in the wrong place and riding over the other one.

It does not look as if that piston came out of that bore, there are no corresponding wear marks that I can see.

When you rebuilt it did you just slap a new piston in there without cleaning or even honing.

In all my years, I have never seen a piston which shows no wear, come out of a bore which looks so poor.

what does the ring locating missing mean? im sure i spun the rings after i took it off the rod but i didnt know they had a specific postion they needed to be in. i just thought the gaps in the rings couldnt be above eachother.

lol i promise that piston came out of that jug. i was really surprised of the condition.

when it was rebuilt i took the jug to t&t racing in bardstown ky. he ordered the piston and said he would need it for the bore or something. i dont really remember. he said he honed it but im not sure about cleaning.

where do i go from here? i dont understand why the bike shut off and wouldnt start back. do you see any signs of this in the pictures? would i be wasting time in rebuilding or is there an electrical issue i need to chase?

 

[jsanders347]

I would be having the bore measured to make sure that it is not too sloppy for the piston.

If all is ok, clean all the carbon away, try to get some sort of cross hatching to the bore, then fit the piston and rebuild.

You should get a fair amount of life from it.

ok ill get the cylinder measured tomorrow. whats cross hatching?

 

[Blaaster]

what does the ring locating missing mean? im sure i spun the rings after i took it off the rod but i didnt know they had a specific postion they needed to be in. i just thought the gaps in the rings couldnt be above eachother.

?

what does the ring locating missing mean? im sure i spun the rings after i took it off the rod but i didnt know they had a specific postion they needed to be in. i just thought the gaps in the rings couldnt be above eachother.

There should be a brass peg in the ring slots to stop the \/ rings migrating into a port.

Cross hatching is honing.

 

[jsanders347]

i did not know that. if i order new rings will they come with the peg? thanks for all your help

 

[Blaaster]

The pegs are pressed into the piston at the factory, dunno how yours could be missing.