Carburetor help

I have yet to come across a rack that can’t be rebuilt…..and I’ll tell you right now, one of the first things I’d do would be to straighten 0ut those throttle shafts as soon as I’d pull them out.

 

Brhatweed…. Your inbox is full

 

Over four plus decades of turning wrenches, I've encountered MANY things that can 'technically' be rebuilt, but they NEVER work right, EVER. Regardless of me rebuilding them or having professional shops rebuilding the parts. NEW always works. On a good day, rebuilt may get you home where you can replace it with brand new.

Starters, alternators, carbs, etc... all the same. New is the only way to go.

Sometimes, things just simply reach the end of their serviceability life.

I've emailed Hitachi, and I'm sure it'll go nowhere, but it's worth a shot.

 

And over 20 years of rebuilding Xj carburetor racks, I haven’t had one that wasn’t successful.

so we have different experiences and opinions.

I have nothing more to add.

 

I'm sorry, but you are wrong my friend. New is only a collection of working parts, if all parts are good, assembled correctly, a rebuild will work. On carbs the wearing parts are the throttle shafts and spindle bores, the emulsion tube tops, pretty much that's it. Luckily the Hitachi carbs don't suffer much in the throttle wear department...
So if they are inspected, parts replaced as required, floats set correctly, wet set checked, and synched, all will be well.
Good luck with Hitachi

 

...and used parts, are not new parts, therefore I am correct. Old, tired, worn-out parts, have to be replaced.

A carburetor is more than just needles, jets, and shafts. The carb body could be worn where those components rest, they could be warped, have micro cracks, etc... all stuff the naked eye would never see. Hence, replacement is best. Of EVERY component.

 

I have 3 friends, who between them, own over 50 motorcycles, and each has 30-40 years experience of wrenching on motorcycles, one of those friends is a certified mechanic. Last week, he came over and watched me rebuild them, while he read the manual out loud. He came to the same conclusion as I did. The carbs are shot (yes, a rarity, but not an impossibility). He told me yesterday that I was wasting my time bothering with them anymore. However, as there are no BRAND NEW carburetors available, and despite my justified bitching, I am also hopeful, and nearly relentless. I honestly came to this conclusion last year. But I've decided to keep trying.

The weird thing is, for most of the riding season last year, these carbs fought me tooth and nail, then about 2 weeks before the riding season was over, the bike ran perfect. This spring, the carbs again fought me tooth and nail, then started working perfectly for 2 weeks, and without changing a single thing, they started running like crap again.