8/8/2023 0 Comments Carb velocity stacksIf you want a clue about what works you should check out some vintage races, these bikes get it done ,makes you look at the candy store caffe' racers in a whole different(laughable) light. seems to me a lot of the guys that run these things competitively use the long biggo K&N filters, personally, I think these look hideous on a streetbike, but competition is not about looks. Honestly, I gotta believe if this is gonna be a fairweather rider for the bike nights and not serious road riiding, they will probably look the biz and your top end will last a lifetime. It's your bike, your choice, but the general idea is they look cool, might give a bit of performance, generally regarded as useless on a streetbike. does any part of riding a 40 year old dinosaur in modern traffic make any sense? are you really planning to use the bike in a performance oriented manner? Who you gonna race?ĭo they make any sense?. After a mile or two of looking down and listening I was able to go back to the exact spot and find the (run-over) stack !ĭo they improve performance? theoretically. I did have one fall off one day and the drop in performance was very noticeable. If you use the AMAL stacks, make sure you epoxy on as well and be warned that the small grub screws will crush the mazak threaded section of the carb body meaning it might be difficult to change back. They sound good and look great so don't let me talk you out of trying it. Main jets went up quite a bit (270s I think) and a change of slide. I did find that they gave a crisper pick-up and more urge at the top-end. The biggest problem was rain running down the back of the fuel tank when parked and dripping into the inlets. The bike did have a cartridge oil filter and it was used on-road in the south-east of England so not the dustiest place.
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