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Author Topic: fuel pump question  (Read 128 times)
stussels
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« on: November 03, 2019, 04:20:46 PM »

anyone know if a 1990 cbr600 fuel pump would work on the cb-1?  got a line on an oem one id like to get since the china knockoffs seem to leak often.  but only if its compatible of course.  thx yall-
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a_morti
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« Reply #1 on: November 05, 2019, 02:23:39 PM »

Only really depends on the fuel hose sizes. I've seen cb-1s with 8/8, 8/10, and 10/10 mm hose (approx, might also have been imperial) all on original hoses with the factory bends. No idea why so many variations.

So that probably doesn't help much.
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stussels
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« Reply #2 on: November 05, 2019, 02:59:56 PM »

oh man i was just thinking of flow rate.  hadnt even considered fuel line sizes.  i may end up replacing fuel lines too since mine are original to the bike.  honestly im not even sure whats leaking yet.  i just tried to start it and noticed fuel on the swingarm and figured it was the pump since its original too.  havent opened it up yet to see whats happening. 
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a_morti
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« Reply #3 on: November 05, 2019, 05:36:21 PM »

Could be the pump itself, or any of the fuel hoses may have split, I believe there's an O ring in the fuel tap, any seals on the carbs could have failed... You're going to have to get involved and finger out the problem before spending money usefully.

The carb seals from litetek are a good shout even if it's not the problem (yet)
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stussels
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« Reply #4 on: November 05, 2019, 05:53:35 PM »

i do have the litetek carb kit.  thanks for reminding me.  got his reproduction frame rubbers too.  just in case.  but due to the leaks location coming down the swingarm and its age im feeling pretty strong about the fuel pump. 
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« Reply #5 on: November 06, 2019, 03:17:11 PM »

Could even be a split in the hose at the bend, although I would put my bet on same place you have.
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stussels
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« Reply #6 on: November 06, 2019, 07:40:02 PM »

yessir.  won that pump auction too.  seller had one for cbr600f3 also.  on ebay
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