1982 XJ 750 SECA Cafe racer

I have done small repairs and servicing over the years but wanted a proper project bike to see if I am capable of creating something working and nice so bought a non running XJ750


Went through the basics
no spark
No front brakes
Clutch seems ok
Back brake

looking at the wiring it appeared that a ham fisted gorilla with a crimp gun and domestic wiring had attacked it over the years.



As I am planning to remove the atari and simplify everything I decided to do a quick wire to see if I could get it to start.



Well it started so hopefully the project is a goer have now removed the carbs for a clean…

My plan is to add this thread to hopefully show progress

 

Good start, always a positive thing to have a running bike before you start to go through it. Looking forward to your progress.

 

I have broken down the carbs and cleaned them. Any suggestions for carb kits and replacement screws UK.

 

Wow you have some pitting action going on with them jets. Not to sure how that happened? I don't know if I have ever seen pitting on the jet heads like that? I would say check with Len by email. Not too sure how much shipping to the UK would be, but he is always a great help.

 

I am a bit worried about being hit with customs as well as the delivery costs


Do people have issues with ebay kits

I can't add a link but usaseller is selling Carburetor Carb Rebuild Repair Kit for Yamaha XJ750 41Y Seca XJ750R XJ750M UK

 

I think it is hit or miss with the ebay stuff. You really have to trust the description and read it very well. For you that might be the best bet so that you are not hit with all the other fees you have mentioned.

 

Yes you will be hit with import duties, handling charges and vat on top of it all. But do not buy a jet or rebuild kit from eBay - they are all Chinese rubbish, the dimensions are haphazard at best, you will be making your life very difficult, and most likely be back here asking us why your bike doesn't run right.
I've looked at your pics, I don't see much pitting on the jets. Just remove and clean with an ultrasonic cleaner then inspect carefully.

 

I agree, the picture looks like there is a lot of dirtiness, maybe not pitting. How would jets get pits anyway?

 

Well. I have taken your advice and the wisdom of you tube……

This is the cleaning…
Carb cleaner and scrub
Ultrasonic
Bicarbonate soda as the medium with a sand blaster
Brushes and cleaning kit

planning to do final ultrasonic and carb cleaner

just waiting for various parts

 

Couple of images

 

Carbs all clean. Waiting on parts to put them back together.

 

Carbs clean and painted. Hope they work!

 

Well….. carbs went back in and it runs on two cylinders. Right had two (if that makes any difference). I have checked spark which is good.

any thoughts? Have I messed up the carbs or is it a compression issue. I have ordered a compression tester but would appreciate any suggestions.

 

How did you synch them?

 

What does it meant to "synch" them?

 

That should be sync or synchronize.

 

If you say so @Huntchuks
To explain, before you fit the rebuilt carbs you need some initial settings, so each float must be set to spec, and tested with fuel to get the fuel level correct. Then each butterfly needs to be set to the same position (bench synch), and the idle speed screw set . Idle mixture screws all 3 turns out is where I start as well.
I set the bench synch by observing the edge of the butterfly relative to the edge of the first progression hole, others talk of cutting up credit cards, using paper clips etc - each to his own, but it's the edge of the 1st hole for me...
Maybe do a search on here with "bench synching, sync, synch" or whatever...Apologies if my Brit abbreviation caught you out.