that sucks but on the levers maybe factory levers for an 80 or a 65 maybe?
Blaster cr80 flat tracker
- Thread starter undergroundart
- Start date
I see a pyramid of problems happening.
Got hot.
Kinked hose.
Damage suspected.
Not starting.
Now rattles.
Next ?
good call on the levers. I didn't think of that. I made a leak down tester. pumped the hell out of it till it was real hard but could nt get the gauge to move. tried to check compression but it doenst hold. one kick and it goes to about 55psi but immediately drops to 0.
Investigation time.
Off with the head!
Or the compression tester has a bad pressure sealing valve, or not screwed in fully.
Off with the head!
Or the compression tester has a bad pressure sealing valve, or not screwed in fully.
If that has a power valve, good luck. The RM250 I just did I put duct tape on the vent from PV/crankcase and water outlet then just sprayed PV covers. Wasn't a "perfect" test as ex plug wasn't quite good/tight. Because the trans vents through the PV no way to tell if crankcase leaks into trans. a leak @ reeds.
im just gonna send it out for a rebuild and get it ported. atleast ill know it was put togerther right. should give us a good base line of what to expect out of it. pulling it out tonight and off to eric gorr in the morning
word from the engine builder is that
The rod is seized. The rod bearing blew apart and that's what scored the cylinder. getting a full rebuild ,punching it out to a full 90cc, and porting. I split 2 stroke cases once before and changed out a crank, but it s not something I feel real comfortable with. glad I sent It out
The rod is seized. The rod bearing blew apart and that's what scored the cylinder. getting a full rebuild ,punching it out to a full 90cc, and porting. I split 2 stroke cases once before and changed out a crank, but it s not something I feel real comfortable with. glad I sent It out
Horses for courses, if you are not confident to do the work, it is a good idea to let someone who knows to do it.
word back from the engine builder is that the complete engine is trashed. make s more sense to buy another one than fix that one. so bought new engine from ebay. got it today, enstalled and ready to rock. kicked it a few times and wanted to start but wouldn't. ran outta time so tomorrow afternoon ill mess with it more. hopefully its just something stupid or cheap. this is getting to be a little expensive and we re running outta time. got nationals going on in 2 weeks. my boy really wants to run the blaster
figured out the problem was no spark. not sure how I fixed it but got it to spark. drove it into the trailer and went out to the track. it fired right back up and I drove it like twenty feet before it died. once again no spark. everything seems fine, im really hoping its just a bad kill switch. gonna sway that out tomorrow. the only other thing I noticed is it seems like the pickup for the fly wheel is kinda far away. I have nt been able to find anything online as a proper gap though. if the kill switch doesn't fix it tomorrow ill measure the gap (so atleast I know what to put it back too) and just inch it closer to the fly wheel and see what happens
got it running just had a bad ground at the coil. didn't have it tightened down all the way. quad starts easy but we re way off on gearing. it just rev s out right away. 15 48 now. did some better research and gonna run a 15 23. sprocket should be here on tues. nationals in town on fri. doesn't leave much time to practice ha
oh ill put videos up for sure. next problem is my rear gxsr brake. is there anyway to adjust it so there s a lil free play in the peddle. my peddle is real stiff ( could just be from the angle or cuz its super long) but using the brake its all or nothing. push the brake and it locks up. would be nice to have a little something in between
didn't make it to nationals. screwed up and ordered the wrong size sprocket. was way to big to fit the axle. got it rigged up though and thought it would be strong enough to make it thru the weekend but I was wrong. only lasted about ten min while practicing at a friends house. it was too small anyways. so the 3rd rear sprocket is on the way. turns out no one makes one for out size of kart axle ( 1 1/4) so had to order a 30mm one and then ill have it drilled out to 1 1/4. had to order it from Germany, turns out none of the shifter kart guys in the states use a 30mm axle. they all use 40mm or 50mm. learning a lot about this stuff as I go. only problem is its getting expensive and the race season is flying by.
Worst case scenario you can get all the kinks out and will at least be all set up for next season..
Just did a full read through. Looking good there, chief. Keep working and you can make a few races or do like jus_me said and have it set up like a champ for next season.
I would say to let me port the engine, but I'm swamped with builds for now. I couldn't have it done done and shipped for at least a week. Plus, my CC right angle piece is about to need new bearings, so I know for a fact that I can't get to those transfers on that little joker if they do go out. I could, however, have that other one punched and ported for you since you have a running engine. I have a local guy that does all of my head designs as well.
PM me if you're interested.
I would say to let me port the engine, but I'm swamped with builds for now. I couldn't have it done done and shipped for at least a week. Plus, my CC right angle piece is about to need new bearings, so I know for a fact that I can't get to those transfers on that little joker if they do go out. I could, however, have that other one punched and ported for you since you have a running engine. I have a local guy that does all of my head designs as well.
PM me if you're interested.
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