Help please :) XJ650 Maxim

Will check tomorrow and report back.

 

If the Bike runs with Enrichment Circuit Open, ... Stalls when Chokes are Closed ... You got a Fuel Supply / Delivery issue(s) to solve.

That it runs "Choked" means Pilot & Main Jet Fuel is NOT being supplied.
Which usually requires a thorough Cleaning with inspection of Diaphragms, their Bores, Jets and connecting Passages.

Before you dive-in,... Check.
You got Gas in it.
Try running it with Petc0ck Switch set to PRI.

 

It does have gas and the petcock switch was set to PRI when we were doing this.

 

So my neighbor is a mechanic and came and took a look at the bike. After listening to it he said it sounds like either the valve clearance is off or the timing needs adjusted. Since I am sure the valves are in clearance that leaves the timing. How do we adjust this? He said we need a service manual and I have one but I was wondering if you guys have any tips?

 

for now forget the broken drill bit, once the choke is off it's out of the picture.
the running sync is very important at idle but as the throttle is opened, not so much.
are the air jets in the right places?

 

The broken drill bit isn't an issue anymore i got new bowls from a local motorcycle scrap yard and cleaned them up really well. To be honest they were in better shape than mine when I got my bike!

I'm pretty sure the air jets are in the right places, is there more than one place I could have put them??

Any thoughts about the timing?

 

the main air jet with the smaller hole goes towards the air filter.
the pilot air jet with the larger hole goes towards the engine.
ignition timing isn't adjustable on these. valve timing could have jumped a tooth but i doubt it would run well enough to get out of the driveway and it wouldn't ever seem right, hot cold slow or fast

 

Hm... well now I am questioning myself a bit. I might have to open her back up and check the air jets.

 

Update: We are rebuilding the carbs again because we found out we didn't replace everything that needed replaced last time such as throttle shaft seals, idle mixture screw o rings, plunger valve seat dust caps, fuel supply tube O-rings. This time we are breaking the rack and hopefully once they are back together it will fix the issues we have been having.

 

Do a simple Mod while the Rack is on the bench.

Grind a few mm's off the Idle Adjustment Rod SPRING.

Add a Nylon Flat Washer to the Rod along with a Stainless Flat Washer.
Makes those Idle Rod Adjustment reach-in's a little quicker and the feel much smoother.

 

What order? Like this? (Might be a silly question)
Carb>>Nylon washer>>spring>>stainless>>screw

 

Put the Rod through the Bracket Grommet.
Next goes the Nylon.
Then the Stainless Flat.
Spring next.

You can also get a Nylon Bushing that fits the Rod thin enough to press in the grommet's ID, ...

 

Okay thanks for the tip!