PART 2.....converting the H40-50-60-70 to HS
ready for Part 2 :shrug: As stated in my last post I was thinking the medium frame H50 style aftermarket may fit the bill without having to mod the spring location, so I went ahead and ordered one up. For under $13 bucks shipped I figured I'd give it a looksy :laugh:
compared to a stock HS40/50 mini bike/header style carb (what I need to replicate):
The choke detent spring is in fact in pretty much the right spot (the Chinese drill it in a little closer than it needs to be to the center, but the clock position is good)
the other things though that dont match are Bowl overflow/vent runs into the inside bore of the carb rather than a pee hole out the side. Of course the throttle arm assembly is incorrect as well and wont mesh with the HS standard linkage so that has to be conveted as well.
The H50 does have a larger bore in the center where it chokes down, I measured the 2 when I pulled the arms and butterflies out.
that might not hold true for all of them or against the older, original carbs, it has been machine bored though the center so they may vary that. Nice that its opened up a bit, but again you get that restriction on the inlet from the overflow tube (that could be taken out pretty easy though and just drill out the side) I also compared the high speed/bowl needle assy's and the aftermarket H one has some larger inlets to it to take in fuel compared to an oem One I pulled from the one nice original HS carb.
swapping over to the HS throttle and header style choke lever was not a problem:
While its not a big deal if your running a remote tank, I could only find this style carb with a straight out the side inlet. that is kind of a pain when its on a self contained engine where the line has to snake though the shroud, It doable but it does not want to cooperate too well usually. It also clearly does not look correct for that application.
The inlets are pressed into the body of the carb, I hit the emtpy body with a touch of some heat for a few seconds and then grabbed the inlet and gave it a twist with some pliers while it was securely mounted in the vice. Anytime I have a dead carb I yank whatever will come off it and try to save it so I have few inlets and will use whatever suits the build best, since these press in, you gotta kinda use your discretion on sealant. Just a quick test fit of this one and I am gonna want a dab of something to make me fell better its tight but I could do it by hand with some force, most older carbs I have to press them back in with the vice.
Hows it work....well I dunno yet :laugh: As you can see I was in test fit mode today soon as the mailman dropped it off with some other goodies I found last week. I still need to go ahead and "rebuild" the new carb, test the float, and all that good stuff. so I will detail out the throttle and choke levers and set that all up when it goes back together and get it tested out soon, I think it should be fine though.