• Enter the March CB750 Supply gift certificate giveaway! It's easy... Click here, post something, and you're entered into the drawing!

Compression down on 1 cyl

No carbs

CB750 New member
Messages
2
Reaction score
0
Points
1
Location
Uk
Hey

Been running through some issues with this bike.
Though it was carb related or spark ,compression test today results cylinder 1 down to 100psi the rest @ 150 cold.. put some oil in cylinder 1 compression cane straight up to 150..

Any advice much appreciated

Thanks
 
Something wrong with it if the number is real, 100 psi is a dead cylinder that will wetfoul a plug in minutes.

Could be rings stuck from the long sitting, the story may not end well if it was sitting outside in the weather though.
 
Back
Top