81-550T, need 9000 rpm

[tkent02]

They usually wait, all right.
Until you least expect to see them.

[Buffalo Bill]

I got redline now! But…

Yes!
I replaced the faulty intake pipe with a new one, and put some 102.5 main jets in and yes it's got good power all the way up to the redline!
The 102.5 mains I got from Bikebandit off the 1983 550 parts list, that's a 16 valve engine but the mains fit the 1981-82 8 valver.

Bummer is, I still can't get the bike to idle below 2200 rpm after it warms up!
I put #45 jets in, stock is 40. But no change. It still dies if adjusted below 2300 rpm. Seems like I can't find the issue?
Could it be that now it's too rich?
This is the most frustrating tuning problem I've ever had.
Bill

[mlinder]

You replaced the leaky intake boot. That's good.
I need to go read over the thread again to see what's been suggested, done, and hasn't helped. Been a while since this thread was looked at.

[mlinder]

OK, did you ever throw a timing light on there?

[Buffalo Bill]

Timing not adjustable…

I haven't put a timing light on there, it kind of acts like the timing is a little bit retarded but with electronic ignition how could I adjust it?
Thanks.

[mlinder]

I haven't put a timing light on there, it kind of acts like the timing is a little bit retarded but with electronic ignition how could I adjust it?
Thanks.

The igniter doesn't do anything until the elec ignition tells it to.
It's told to when the little magnet passes the trigger.
Ignition box decides when to start the advance (which is actually reducing the retardation).

You can still adjust when the elec ign is triggered, because the plates and magnet and such are still mechanical devices.

Plate turns one way or t'other to advance or retard timing.

[Big T]

Yes!
I replaced the faulty intake pipe with a new one, and put some 102.5 main jets in and yes it's got good power all the way up to the redline!

But no change. It still dies if adjusted below 2300 rpm. Seems like I can't find the issue?
Could it be that now it's too rich?
This is the most frustrating tuning problem I've ever had.
Bill

You only replaced the one intake boot?

High idle is a lean symptom, replace the rest of the boots. Larger jets are just masking the problem

[Buffalo Bill]

I got some work cut out for me…

Big T,
Replace the last 2 as well? Doh, dat's another $60 bucks!

mlinder,
The 550 service manual only shows the point type ignition, but I'll try the plate adjustment. I can do that easy and it won't cost me nuthin'.

Thanks. Bill

[Buffalo Bill]

Ignition advance not adjustable…

Looks like I go with Big T and put in all new intake pipes.

Ignition advance is not adjustable for the newer electronic type, it's got no screw slots in the plate.

Bill

[mlinder]

I'll have a look at mine tonight.

[Buffalo Bill]

Problem licked! (After a year and a half)

Yes, I put in the last 2 intake pipes so their all new. Got 1100 rpm idle speed just fine! Had to close down the air screw a little bit as well.
I did a test ride too and no problem getting 9000 RPM, with plenty of power for a 550.
I'll have to wait for some warmer weather to fine tune the mix and sync the carbs, but not a problem.
Thanks for the help!
Bill