Craig380 wrote:The cold cylinder compression reading doesn't mean much: compression can only be accurately checked when the engine is fully warmed up. That said, 90psi when cold shows that the bike
does have some compression, probably enough to get it started. When hot, compression should be at least 120psi with no more than 10% difference between the two cylinders.
Can you smell gas when trying to start it? If you can, fuel is getting through. It's worth noting that with the Mikuni carbs on Suzis, do NOT open the throttle when using the choke to start from cold. Only tweak the throttle once the engine has actually fired.
About the sparks. Does your bike have Suzuki's PEI electronic ignition? If so, these can fail so that while you still get a spark, it is delivered at completely the wrong time, way after the piston has passed TDC - which means you might get an occasional pop or fart from the bike, but it won't run. You can check this using a dial gauge to see when the spark is actually delivered.
The only cure is repair or replacement. The good news is, Rex's Speed Shop can fix these in the UK.
http://www.rexs-speedshop.com/epages/es ... oducts/GT1" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;
>>Can you smell gas when trying to start it? If you can, fuel is getting through. It's worth noting that with the Mikuni carbs on Suzis, do NOT open the throttle when using the choke to start from cold. Only tweak the throttle once the engine has actually fired.
I do NOT smell gas while trying to start.
I understood that I am NOT supposed to open throttle when starting from cold.
BTW, one silly thing I am doing: Right now I do not own a spark plug wrench, so I have just tightened spark plug as much as I can using fingers! Will this drastically affect starting of bike?
Also I I have yet to put back the air filters on both carbs. Will this make bike not starting?
On one of the carbs, I have not been able to replace needle value and seat.
I am thinking of ordering one soon.
I have cleaned carbs from inside, cleaned pilot jets, main jet, replaced gaskets, freed up seized choke plunger
on one carb, cleaned up gunk from inside of carbs, replaced both carb boots, replaced needle valve and seat on ONE carb.
Since bike has not been started in many years, i suspect dirt from fuel tank may have got into carbs,
so I plan to cleanup carbs one more time, just to make sure.
>> About the sparks. Does your bike have Suzuki's PEI electronic ignition? If so, these can fail so that while you still get a spark, it is delivered at completely the wrong time, way after the piston has passed TDC - which means you might get an occasional pop or fart from the bike, but it won't run. You can check this using a dial gauge to see when the spark is actually delivered.
Yes, bike has PEI ignition.
I am not getting even occasional pop.
Do I need to buy this dial gauge right away or should I rule out other possibilities first?
Thanks.