I just recently bought my first blaster also being my first quad. My first ride it blew up. I checked the compression it was brutal. I had the top end rebuild. Finally got it back and went for a ride. Like three hours in I was coming down a dirt road in 4 and it cut out. It hasn't started since. What could this be and what could cause it.
Help!
- Thread starter Brenthickey
- Start date
Yeah the engine was properly broken in the guy said he rode it for acouple hours. I pulled the plug and it was black. I guess the plug was messed up and screwed up the thread of my cylinder head. So I can't really do any trial and error at the moment. I don't know what my jetting it at. What do you think it should be at. I'm a newbie to two strokes and quads in general. Is there a way to tell what size jets I have?
riding for a couple hours does not make for a good break in.
You need to do three heat cycles, re-torque the nuts on the cylinder and head. Then no more than half throttle riding for a tank of fuel.
When you got the engine rebuilt was it leak tested?
List your mods and we can give you an estimate on your jetting.
You need to do three heat cycles, re-torque the nuts on the cylinder and head. Then no more than half throttle riding for a tank of fuel.
When you got the engine rebuilt was it leak tested?
List your mods and we can give you an estimate on your jetting.
Well they claimed they broke it in properly so I wouldn't think that's the problem. It was not leak tested how would you do that, he replaced the tope end seals and gaskets though. The only mods I have are
-full fmf pipe
- tors removed
-oil injection blocked
- mikuni carb idk if that matters
-stock filter with the lid on
-full fmf pipe
- tors removed
-oil injection blocked
- mikuni carb idk if that matters
-stock filter with the lid on
Here's my thoughts.
1. Anyone that does a top end and doesn't do a leakdown test is an idiot.
2. If you didn't figure out why the motor blew up the 1st time, it's definitely going to blow up again.
3. You shouldn't have pulled the head off.
4. You could have used a rubber tipped compression gauge to check the compression.
5. You could have used an expanding rubber plug to seal the plug hole so you could have done a leakdown test.
6. Now you're screwed.
1. Anyone that does a top end and doesn't do a leakdown test is an idiot.
2. If you didn't figure out why the motor blew up the 1st time, it's definitely going to blow up again.
3. You shouldn't have pulled the head off.
4. You could have used a rubber tipped compression gauge to check the compression.
5. You could have used an expanding rubber plug to seal the plug hole so you could have done a leakdown test.
6. Now you're screwed.
If I were at your juncture in life, I would put the head on with the used head gasket and a very thin layer of rtv sealer on both sides of the gasket. THIS IS ONLY FOR TESTING PURPOSES. Then do a compression test. (It's going to be about 30 PSI). Then do a leakdown test. Then when you find air leaks, decide your next plan of attack to fix the air leaks, rebuild the top end, do a leakdown test, and properly jet it.
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