What did you do to your Yamaha today?

Tested the cam position sensor for the sequential fuel injection upgrade. Hope to get a lot more done the rest of today.

 

Total progress yesterday was making new intake gaskets, reinstalling the intake manifold, and painting the injectors. Goals for today are adding the two new injector channels to the harness, adding the cam position sensor to the harness, adding a pull-up resistor for the cam position sensor in the ECU, and maybe reinstalling the injectors.

 

Took apart the 1977 for parts.

 

'77 what? I didn't think there were any XJs before 1980.

 

I think he picked up an xs and decided it wasn't worth the effort

 

Yikes, it's a yics tool.

 

Best paperweight I've ever seen

 

I put the new speedo cable on the 700 Air Head today, now if this weather ever warms up. Yes the above was a xs, my bad about this thread being the xj....sorry.

 

Had to build one to be able to try both ways.

 

I get it. I would just hate to snap the passage removing the bolts. someone had a post of that a few years ago

 

Replaced the grips with some Bikemasters, added a clamp to better hold the throttle cable in place, and started on the harness updates (figured out what needs to happen, removed pins that will need to be replaced, and desoldered connections that will need to be separated). Also, accidentally broke a leg off the VR conditioner IC while trying to make sure the attached components had enough clearance from the main board... luckily I had bought two NCV1124s originally, so I had a replacement on hand. Added a 10K pull-up for the cam position sensor to the ECU board.

 

Like the colours. Does it match the bike?

 

Just got my custom-made stainless silencers back from fabricators!
Uploaded a couple of pics to peruse....as near to stock as possible...possibly just a bit shorter? See pics.
£200 for both! Whole exhaust system is now stainless.
Regards.

 

Those silencers look great. Do you have contact details for the fabricator?

 

Colors don't match. I just bought what seemed to be the right size silicon tubing and it happened to be purple. The metal tubing is 1/4" brake line instead of soft copper.

 

Tested the cam position sensor (and the new VR conditioner IC), and they look good. Got good signals from both during cranking. Added the other two fuel injector channels to the wiring harness. Bought a new battery (old one was just not holding a charge).

Also the first time using the Bluetooth serial connection that I hacked into the ECU instead of a cable. Worked great. Will be very helpful to not have to wire up a laptop to the bike to do data capture for tuning.

 

Got the "unobtainable" air scoops in the mail today so I took a ride to yamaha center and was happily surprised that they still had the original fittings in store, dirt cheap even.

Couldn't be happier, bike is now complete!

 

Tightened all the muffler and pipes clamps and mounts. Went to clean the YICS passage and it was clean as a whistle. Ran a camera through and all the holes look clean. Tried setting the idle mixture by sound by setting all carbs super lean and adjusting one at a time to rev higher but everything would still run smooth even with only 1/2 turn from bottom on all carbs. Adjusting out more seemed to have little affect. Ended up just putting them back to 3 1/2 turns for now. Balanced the carbs. Everything will need to be redone after after adjusting shims in warmer weather. The big issue I have is with engine rev. Blipping the throttle revs too much and takes too long to come back down. When riding I have to make a point of letting off of the throttle a bit extra before pulling the clutch or it will rev. The cable moves freely and the shaft moves quickly but there is that dang slow to return to idle rev. All boots are in good shape, tight and with no vacuum leaks that I have found. What else could be causing this?

 

Do you have a ColorTune? That would be helpful... or a stand-alone wideband O2 sensor to check idle mixture. Hanging high when warm still sounds like it's too lean.

 

Yesterday, installed the new battery, and searched all over but failed to find the replacement injector O rings I'd ordered a couple of months ago. Ordered another set from a local parts store so I should be able to reinstall the injectors this evening. Will run some tests on each of the injector plugs to make sure they're firing correctly before reinstalling the injectors themselves.