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Rejetting carbs 29 Mar 2015 17:24 #665666

  • matigipler
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Hey guys!! I'm new to this forum and new to the kz/motorcycle world! Forgive me if This post isn't in the right spot. Anyways I bought me a kz750 e. (4cyl) with mikuni carbs and I'm doing a cafe project with it. Anyways I'm probably going to weld me a 4to1 exhaust and put pod filters and I need to of course rejet the carbs. I'm kinda lost here since I never done it.
Current main jets are 125. I was going to buy 130s and see where that gets me by looking at the plugs. Any tips or anything I can base myself on?
I'm sure this is asked a loopy but I found little info on this specific set of carbs.

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Rejetting carbs 29 Mar 2015 18:35 #665679

  • SWest
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Pics? Weld a exhaust? One step at a time or buy a kit from Z1 maybe jetsrus.
Steve

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Rejetting carbs 29 Mar 2015 20:52 #665729

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hey steve,
I havent done any exhaust work yet. but i like the way 4 into 1 exhausts look. not sure if straight pipe or muffled, i read straight pipes don't perform so good. as far as filters im gona get some K&Ns. i just want to know what jets to get, a good place to start i guess.
Main jets are 62 i believe and secondmain 125s. or the other way around. what ever makes more sense.
i heard i want to add 5 if i go with both exhaust and POD filters. im not sure if that goes with all bikes or its different between bikes.
not sure pics of what you wanted.

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Rejetting carbs 29 Mar 2015 21:59 #665734

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There are good 4/1 exhausts available used. There is a good thread about straight pipes and how they perform against baffled. They even installed a bolt and got more power out of a open pipe on a Dyno.
Just want pics of the bike. I was a line welder and wanted to make my own in the 70's. Never did. Too many guys beat me to it. Now I run a V/H 4/1 and love it. I just want to ride, not fuss around with this thing. Better things to do.
Go a step up with pods, another with 4/1, another uncorked. Check your plugs.
Steve

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Rejetting carbs 30 Mar 2015 04:19 #665753

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Making you own exhaust system is sort of like taking out your own tonsils. It can be done, but the odds are that the results won't be great. :laugh: Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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Rejetting carbs 30 Mar 2015 05:13 #665756

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There are a bunch of discussion threads about jetting for pods and various exhaust configurations. There is also a thread with a link to an article about exhaust theory and design. I think it is titled, for the scientifically minded. Use the search text box to locate these discussions. One of the members here dived deeply into the custom exhaust world (OMR??). I think it exhausted him first.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Rejetting carbs 30 Mar 2015 05:18 #665758

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1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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