Is 105 Psi Comp Ready To Let Loose Or Not.

[oldturtle]

I bought my first Banshee last month. Runs fine and makes enough power for me. I cannot hear any sound of piston slap or other sound of impending disaster. I just ran compression test and have 105 psi on both sides. We checked twice with two different gages throttle open and got identical results. I hate to mess with it since it pulls hard and is such a kick to ride. It starts very easy. However if I am on the verge of breaking a piston skirt I should pull it down and take a look see. So how low can you go with compression on stock motor before you should do a top end as preventive maintenance even though you are OK with the power.

[jrm312]

you should probally do a rebuild now, at 90 to 100 psi it will be hard to start when cold when its warm it will start better.

[.]

whats your elevation? Mine let loose at like 95-100 psi. But I was at 1000 ft. If your up 3000 feet or so compression is gonna be lower

[oldturtle]

Thanks for opinions. Elevation is sea level.

[baddboyy21]

If you are at sea level...you really need a rebuild. Thats just my oppinion!

[MotulMonsta]

AHH run it till it blows!! That's my motto. Then fix her up...I'll do a rebuild every 2 years or so. So if it isn't giving you any real issues, don't waste your money if your happy..just remember..when a motor decides to go, it might not give you a warning.

[.]

It'll give you a warning, all of a sudden it will get really fast. When mine went down at Hatfield-McCoy we were up in the trails and all of a sudden my shee got real fast, like hold on fast again like when I first put the pipes and stuff on. I thought I might of just cleaned it out on a stretch (running in a higher gear to save fuel). But got out of the trails and was on the road back to camp and the one piston ring let go. Made it back to camp, but just my experience.

 

And if your at sea level with pipes and no other mods you should be sitting at like 125 or so I would believe. 120 is a good margin and what most shee's sit at (unless in really high altitudes or really low altitudes. Whatever it is, it should sit at a constant (around 120 somewhere), when it starts dropping, you know your engine is starting to wear out.

 

I'd say your ready for a rebuild, do it before it lets go, it could cause a lot bigger problems than a bore and a new piston kit.