2014 Yamaha viper 162

[TURBLUE]

Having a weird issue with the sled. Last year on the last ride. I blew a belt while accelerating…heard a loud pop/backfire ish sounding…quite violent. After that I the sled felt lazy. Seemed like it was building boost slow.

I checked the airbox and everything was attached…figured maybe it was in my head since I never road it much after that.

Finally got out and it feels very laggy. Builds to maybe 6 psi at 6000’ and it’s very slow slow to build. I never pressure tested anything yet…any thoughts? I guess I should of pulled the tank off and made sure the exhaust doesn’t have a hole.

 

[MrSled]

are you sure the clutches are cleaned good. No want parts? You have gauge to read afr?

 

[TURBLUE]

Yeah clutches are good. Went through them. No afr….it’s still got power just not as much and slow to build. Before it was 8-9psi at 6500-7500’. It changed after the belt blew. Before that it pulled good.

I’ll pressure test it when I get home. Check exhaust.

 

[MrSled]

What elevation? That motor with that boost won’t last at see level.

 

[TURBLUE]

6500-8000’ depending. Never see sea level here.

 

[MrSled]

Look for a boost leeks and check all vacuum lines to blow off and to waste gate.

 

[TURBLUE]

The other weird thing is it pulls like -20 inhg of vacuum driving not under boost. It wasn’t that much before. I checked the gauge accuracy with my digital pressure gauge and it was bang on.

 

[TURBLUE]

If I don’t find anything maybe I’ll throw a manual boost controller on to eliminate the solenoid

 

[MrSled]

The other weird thing is it pulls like -20 inhg of vacuum driving not under boost. It wasn’t that much before. I checked the gauge accuracy with my digital pressure gauge and it was bang on.

Ya that’s no right. Something is leaking down.

 

[TURBLUE]

Kinda feel dumb for not checking it this summer. Hose clamp slipped. Tighten and pressure tested to 15psi.
Also removed the screw on the gauge body to equalize. Wasn’t at zero. All good.

 

[MrSled]

Kinda feel dumb for not checking it this summer. Hose clamp slipped. Tighten and pressure tested to 15psi.
Also removed the screw on the gauge body to equalize. Wasn’t at zero. All good.

View attachment 165136

Awesome!!