where are you racnod, theres a few guys in melbourne that have modded thier hitachis to run the brittish sus kits, heaps available, or try sourcing a lynk manifold where you can use brittish sus instead of hitachis, a lot more options for kits and needles

those ones on ebay that i used work, they require little mods to the carbs and work well
i just used my original needles

I saw a rebuild kit for twin 38mm flat-tops on ebay recently for about $80 plus postage.
It consisted of intake and manifold gaskets, a bunch of circular seals plus two float valves.
Does that seem like a reasonable price?
If I can do better--where?

Cheers
Racnod

or just go stright lpg like me and dont need needles and seats, just the piston to rise and fall.

oh right, i see what you mean now. Thanks for that guys, that should help me sort them out. Cheers

Hmm the Hitachi sidedrafts use the same fuel inlet needle & seat as the Hitachi downdraft.

So no special repair kit is needed. You can use regular needle & seat and make your own fuel bowl gasket (or just reuse the original), it is a very simple design. The gasket holds no vacuum.

None of these parts normally wear out:




The needle/seat sometimes need replacing, but rarely. The gaskets usually can be reused.

No, not saying that.

Question: flat top hitachi rebuild kits... anybody know whether 1600sss ... or SP311 twincarb rebuild kits are better suited for a12t hitachi carbs?

Answer: Neither 311 nor 510 (1600) twin carbs are flat tops.

Answer 2: I would guess the 180B (1800) kit would be closest as it is probably flat top type. But don't use the needles that come with the kit unless yours are damaged. Just use the needles you already have.

so are you saying that none of these will work with flat tops?? from what i've read i was under the impression they were basically the same inside??

Most rebuild kits don't come with needles. Just a needle & seat assembly and a couple of gaskets. If you get one with needles, none of them will be correct for the A12T, unless you get A12T rebuild kit.

The 510 SSS (1600 SSS or 1800 SSS) uses HJL38W
311 1600 uses HJB38W
311 2000 uses HJG46W

None of these are flattops.

yeah cheers I've read that one during my search, it mentions both 510sss and sp311 roadsters. Just wanting to know if one is better than the other. Gaskets are the same but needles different (never had anything to do with hitachi's as you may guess from my newbie questions!!)