semery98

Hey all. I am hoping that you all can help me, because I'm about ready to set my Hawk on fire.

I tried to do the carb set up that has seemed to worked for many, many members here, but I neglected the fact that I am in Denver, and the bike was running awfully. I couldn't get past 5500 rpm, and getting up to that point was a slow venture.

I tried another set up, but I won't get into the boring details, because it wasn't much of a change.

So now I'm back on the stock set up with the 45 pilots, stock needle shims, 175/178s, and about 2 screws out in the front and 2.25 out in the rear. Still runs the same. Won't accelerate past 5500 rpm. It does run slightly better with the choke on, but not much.

I need your guy's help! I don't believe it's a PVLIR, because the vacuum line is connected on the side of the petcock.
What else could it be? Is it possible that the slide isn't opening, and hence the main jet isn't coming into use?

E.Marquez

You would not be the first to not have seated the slide diaphragm correctly and you have a slide not lifting.

Or other vac leak

semery98

I guess I will pull it apart again and see. The slides and the springs went back pretty easily for me, so I'm confused as to why they aren't sealed.

supermarto

Could this not be a timing chain off a tooth issue?

E.Marquez

Sure... but he said he worked on the carbs... as it's the internet.. when someone says I DID XYZ... ya kinda have to take them at their word and respond to what they posted...

It could be a broken piston ring causing a light seize in the motor.

It could be an ignition wire that has an intermittent open.

It could be the rider is resting his foot on the kickstand and activating the side stand switch as the RPMs go up..

But as he said he just worked on the carbs..... most I think will limit the suggestions and responses to,, things dealing with carbs and their removal, disassembly and replacement.

Other than a runability symptom which matches a different issue... How did you come to a CCT or cam timing issue?

Perhaps I missed something in an earlier post of the OP's?

E.Marquez

It 's just A possibility.

If you're sure as your thread implies the issue is related to recent carb work.

Vac leak
Carb mis-assembly
Damaged, unserviceable carb parts ( seen a brand new out of the package main jet, not drilled)
Or a rag left in the air box (yes seen this more times than I can count)

Those are the first things i would rule out...

Then start the diag process on other items that may have simply failed coincidentally to your carb work.

semery98

All good suggestions. However, I pulled the carbs off last night and sure enough one of the diaphrams wasn't sealed properly. Although it looked sealed, the slide would slam shut after opening. I will install the carbs tonight and see for sure if that was the problem.

This leads me to my second question. As you can see from my signature, would it be beneficial for me to do 8541 Hawk's carb set up, or would my current altitude of 5280 feet make the bike run too rich? I have done quite a bit of research the past week on the different fuel/air circuits in the carbs, so I'm thinking maybe just shimming the needles to provide more mid range power? What do you guys think?

supermarto

From his first post:

I guess I was wrong to presume I thought he meant that it was running like this before doing his carb work, because that's how it reads.

semery98

What prompted all this carb work was that after I put my slip-ons on, I hit a flat spot under hard accelerlation around 8k rpm.

Bike was running good (except for the flat spot in the acceleration) before all the carb work.

eersfanpilot