no low end...no top end...help me 8(

[The Timmer]

i have a superjet with a 61x top end and a 62T lower end.... to title says it all i have no top or low end man i have no idea what is going on...i have checked for exhaust leaks, broken reeds, i have also checked the rings to see if they are sticky, both cylinders have 155 compression what else could this be??????have the following mods shaved head...B-pipe...dual 44mm mikuni's i think...riva intake manifold...prok air filters


Thanks Tim Willemain

 

[motojunkie96]

Need to know what carbs you have and what the jetting currently is....

 

[botizzle]

155 psi not very high compression considering the head is shaved...something to look into

 

[stanton]

overheat sensor

 

[Gainera2582]

List your jetting and remove the overheat sensor just in case thats malfunctioning.

 

[ski4]

is it running good?
could this be a pump issue/ prop ?clearance?

 

[Gainera2582]

Ok, I got a chance to ride the boat today. It runs real sluggish and seems like its on one cylinder. I checked compression with his actron guage, and I got 120 and 150 ish. Tried it a few times and same thing resulted. Well, I tried my craftsman gauge and it read around 170 in both cylinders.

As for the spark, it seems very weak compared to my stock electrics with a redone coil, so Im assuming either its the coil, cdi, maybe the stator?

The carbs are 44s, and apparently the boat ran great when he got it but one day it just started to run like crap. I didnt see an overheat sensor on the boat either.

Any other help would be greatly appreciated thanks.