help please.

i was not holding the throttle open. didnt know you had to hold that open. i will have to redo the compression cheak with the throttle open. and also im pretty sure my reeds are fine. but i will take them of and cheak them out also. i will let you guys no whats going on after i get off work.
 
okay well i did the compression cheak on it before i went to work today. and well i held the throttle open and the compression went to 100 and that was it. im getting so irritaded with this bike.
 
you held the throttle wide open, and kept kicking it until the needle stopped ???
(sorry bro, not trying to aggrevate you any more than you are, but i had to ask)

i'd also try a different compression tester to rule out that being faulty, is it getting a good seal at the plug hole ??
(i have one now that needs a new o-ring)

was it heat cycled and the base/head bolts retorqued ???
 
yea i kicked it probably more then 5 or 6 times. i did it untill it stopped moving. and it was wide open.ill have to go get another tester from one of my buddyes and see if it will make a difference and im pretty sure its getting a good seal. im going to take my reeds off tonight and see what if anything is wrong with them.
 
again.....was it properly "heat cycled" and the base/cylinder bolts retorqued after the final cool down ????
and the compression should increase slightly as the rings seat

here..............

=
 
Last edited by a moderator:
ok, back to the basics

is it getting fuel ??? good fuel flow from the petcock to carb ? is the plug wet when pulled after trying to start it ?

is it getting good spark ? try a new plug ??? hold the plug in the boot against the head and kick it, see if you have good blue spark ??

was/is the flywheel key in and properly torqued ??
a slipped flywheel will show spark, but it'll be at the wrong time in the cycle

was the tors brain inder the hood unplugged ??

run down thru this troubleshooting guide............
http://www.blasterforum.com/engine-13/my-general-troubleshooting-maintenance-30347/
 
yep i already cheaked all of that. plug is wet. fuel is good. and the spark is good. its all torqued good.
 
Did you try a new plug?

Sometimes a plug will spark well on the outside but will break down under pressure, and not work when installed.
 
I had a hell of a time after i rebuilt my last one did everything and it wouldnt start.

Ended up finding a split in the boot that goes from airbox to carb put a new one on and it literally fired right away.
 
I mean at this point not so worried about to starting cause can't really do anything when your only running 90 to 100 psi ya know. But ill also cheak my air box tube. I'm in the garage right now and I just tore off the head and now working on cheaking the reeds and gunna tear off the jug to cheak the rings to make sure there not out of grove.
 
Alright tore the motor apart and checked the rings thye were all in the right spoots and gaps. So I put all back together but this time I put a stockk head gasket on instead of a high comp gaswket. I did a compression cheak with out the reeds or the carb on and it had 120 psi. I put the carb and reeds on and it was 100 psi. Any suggeswtions. Also when I put a flashlight to the back of the reeds I can see several little pin holes very tiny. I have the carbon fiber vforce reeds. ???
 
The good thing is it appears you have good knowledge of motors.

Some carbon fiber reeds (tdr for instance) you can see light thru them in areas but should not be actual holes.

In theory reeds do not play a major role in compression numbers when your kicking it over, they are designed to let in fresh air/fuel mixture and stop burned/burning mixture from exiting through the intake. (backfire on a 2 stroke is a sure bet your reeds are bad)

You said 120psi with reeds cage off and 90psi with reeds installed with carb.
This tells me something is restricting air going into the intake side of the motor,could be reeds have holes,cracks,or old and not flexable enough to funtion properly. Or airfilter/airbox dirty and or intake tube plugged.
Another problem could be the (Exhaust) silencer full of oil or could even bee's nest or mouse nest built in it.Or worse case would be air being pulled
thru the case halfs/and or seals.

The better the compression the easier 2 strokes are to start.More air is pulled threw the intake,reeds,and carb. This is also known as air/fuel velocity.

Could you for a test with everything installed (reeds,carb,exhaust ect) pull the plug, put in a few cc's of mixed fuel into the sprkplug hole, install the sparkplug. Kick it over with about 1/8 throttle. If the timing is correct and plug is good then it should a least fire up for a few seconds.

Keep me informed as I would like to know the outcome..

Thanks
 
yeah. the sad part i was thinking the seals in the bottom end were sucking air. i didnt want to make my self belive it but its ethier the reeds or the seals. it has to be cause it has to be one of those everything eles is fine. but a question i havent yet got answered but really havent asked was. would i have a low compression right now seeing the motor hasnt been ran at all yet and rings and sh*t havent been able to seat yet??
 
i posted above that the compression will rise as the rings seat.

have you pulled the flywheel to check if the woodruff key has slipped ???
it'll spark, but not at the right time
 
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