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TB parts AFT 20mm carb kit?

5.6K views 19 replies 13 participants last post by  firepower354  
#1 ·
the one they have posted on there website for 99 dollars? is it worth it? does it leak or any thing bad about them. are they hard to jet? this is goen on my crf50 with a ahpminis 72 kit so i was just wondering if its a good deal because the price is great! please someone help me out here
 
#12 ·
crf50luke said:
the one they have posted on there website for 99 dollars? is it worth it? does it leak or any thing bad about them. are they hard to jet? this is goen on my crf50 with a ahpminis 72 kit so i was just wondering if its a good deal because the price is great! please someone help me out here


I've pulled them from the package, bolted them on, and had one-kick starters. From 72-117cc, no issues.



As the Dr illustrates, the venturi is well under 20mm, so it will work fine on the AHP 72.



Image




KLX110 carbs work OK, too.
 
#17 ·
i would suggest DONT BUY IT!!!! That is unless you are extremely extremely tight on money. Otherwise, avoid it at all cost. Seriously, anything labeled AFT or Shengwey should be avoided at all costs, as well as the other knockoffs. I say this about the shengwey from personal experience.



First, it was hard as hell to tune when it ran well. Not saying you cant tune it well, but it was extremely difficult, and I learned as much as you can about carb tunning without handling one before i even touched the thing.



Second, the real problems started at about 10 hours worth of run time. First it just leaked fuel occasionaly. Please, guys, dont assume im an idiot here. YES the fuel bowl drain screw was closed. At first this seemed as though the float position was just set wrong. I moved this to the recomended position, it still leaked. 14 carb disassemblies, reassemblies, and then testing for leaks later, i got it to stop leaking fuel by having the float height set so high that when you screw the bowl on the float needle was all the way seated in the fuel intake, with slight pressure on the springy piece that comes out of the needly. Yes i completely rebuilt and thoroughly cleaned the carb before even messing with the float height. And it STILL leaks every once in a while(and no, its not because my kickstand height is low enough to make the float not actuate). On top of that, the needle can no longer even become fully removed, so the bike cleans out the fuel bowl and DIES when full throttle is given for more than 3 seconds. I then have to wait 30-60 seconds for the fuel bowl to refill so i can start the bike.



Just avoid these carbs. Maybe they work for some, but even when they work they are extremely finicky, and you risk getting a complete POS like mine. Spend a little more and get a good carb.