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I think I've blown a head gasket
- SWest
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06 Sep 2015 08:18 #688848
by SWest
Replied by SWest on topic I think I've blown a head gasket
On the mouth of the carb is a large vent at the top. Lift the slide, put your thumb over it and see if the slide drops fast or slow. It might also be sticking.
Steve
Steve
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06 Sep 2015 08:20 #688850
by GPzMOD750
Replied by GPzMOD750 on topic I think I've blown a head gasket
is fast or slow preferred?swest wrote: On the mouth of the carb is a large vent at the top. Lift the slide, put your thumb over it and see if the slide drops fast or slow. It might also be sticking.
Steve
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06 Sep 2015 08:27 #688852
by SWest
Replied by SWest on topic I think I've blown a head gasket
Slow.
Steve
Steve
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06 Sep 2015 08:54 #688857
by Nessism
Replied by Nessism on topic I think I've blown a head gasket
I don't think the issue is the head gasket. Your compression numbers wouldn't be so good.
Most likely the bike is dropping a cylinder. Could be ignition or carbs related.
From a cold start you might want to check to see if all the exhaust headers are getting hot. Just be careful to not burn yourself. This will help you figure out which cylinder is the offender.
Most likely the bike is dropping a cylinder. Could be ignition or carbs related.
From a cold start you might want to check to see if all the exhaust headers are getting hot. Just be careful to not burn yourself. This will help you figure out which cylinder is the offender.
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06 Sep 2015 18:34 #688916
by GPzMOD750
Replied by GPzMOD750 on topic Re:I think I've blown a head gasket
Already checked pipes at idle. They're all firing then.
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06 Sep 2015 20:34 #688930
by LineArtist
If points set dwell and check TIMING. If electronic test the unit for continuity - like Steve said it could be bad. Also make sure the spark plug wires are cleanly connected and spark plug caps are good. Make sure spark plug wires are going to the right plug.
Often times it's a simple fix, don't overlook the basics before getting into major work - these bikes are built to last.
...just my 79 cents
'79 KZ650B3 (stock)
'79 KZ650B3 (parts bike)
'06 HD 883R
Replied by LineArtist on topic I think I've blown a head gasket
swest wrote: spark advance
points and condensers, if electronic, (suspect)
Steve
If points set dwell and check TIMING. If electronic test the unit for continuity - like Steve said it could be bad. Also make sure the spark plug wires are cleanly connected and spark plug caps are good. Make sure spark plug wires are going to the right plug.
Often times it's a simple fix, don't overlook the basics before getting into major work - these bikes are built to last.
...just my 79 cents
'79 KZ650B3 (stock)
'79 KZ650B3 (parts bike)
'06 HD 883R
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07 Sep 2015 07:46 #688981
by GPzMOD750
Replied by GPzMOD750 on topic I think I've blown a head gasket
Thanks all. It appears I had a blown exhaust gasket not a head gasket. But I still need to figure out the culprit.
For the record this bike has the original induction timing, Not points though I have seen the Maxdwell system.
I'm going to slow down and go through everything slowly and methodically and shoot for having it back on the road next week. besides i need to fashion some decent exhaust hangers or I'll probably wreck something the first decent bump I hit..
For the record this bike has the original induction timing, Not points though I have seen the Maxdwell system.
I'm going to slow down and go through everything slowly and methodically and shoot for having it back on the road next week. besides i need to fashion some decent exhaust hangers or I'll probably wreck something the first decent bump I hit..
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