hey all! well, still working hard at my 1985 Kawasaki ZN1100B2 LTD. It has been a blast thusfar doing my custom rebuild and creating my own touch on the bike. So, my last piece of fun work was starting the carb work. As they have sat for a very long time on a shelf, I was actually expecting them to be in decent shape. BAD assumption... oxidation plus rust lines yielded a scary thought for me... "New carbs"? dooh.. Out comes my polishing compound, carb cleaners, and bunches of time.
Now, they are ready to rock... so I thought... I pulled all the parts and detailed what I now had and what I wanted. After doing research and research, I contacted Mikesxs.net. They specialize in XS650's and he sells BS34 parts and all the needed things I need. After an email, he came back saying sorry, he only supplies XS's... pfft.. whatever... thanks for the help.. Just trying to give him business. So, last night, I put my hands on my carbs and tried pulled the choke... ummm... stuck? but I just cleaned 'em and made them all pretty and nice... Conclusion of this left me grasping the head of the choke plunger of two of the carbs--- vice grips, tried to twist and slightly break free the plunger, and.. SNAP! one head broken off. This left me taking the 4 carb assembly apart. It took me longer than expected to figure out how to take the choke off. Worst of the worst happened.. I ended up having to drill the plunger out since it broke off a second time inside at the larger cylinder plunger portion. I drilled, tapped, and finally pulled the plunger cylinder out. I then had to fine sand the internal casting and polish it to the stock luster... wheww... scary indeed..
Conclusion: I am ready for parts and have yet to find them.
What I have found installed:
Main jets-- 122.5 AND 127.5 (2 of each-- never seen this before, is that right?)
Jet Needle- 5C50 (have yet to find many needle specs that include this 5 series Mikuni needle--started using it 1981 if i remember correctly)
Needle Jet-- 476-Y5 (havent found too much on this Y5 either)
Pilot jet-- 37.5
Float valve-- 2.5
Now onto jetting. I would like to buy a few sizes of the main jets so I can go through my troubleshooting and tuning for this engine with K&N individual pods and aftermarket 4 into 1 exhasut. I would also like to get the Canadian spec adjustable Jet Needles for finer tuning of my midrange since I will be buying the larger Mains. I wouldnt mind getting new needle jets as well--are there size differences i need to be aware of? I will want to potentially buy a few different sizes pilot jets as well, but I will definitely need replacements on my current 37.5's (whether with those or different sizes) since at least one of the heads is gouged and potentially irreplaceable. With the float valves, I will just buy rebuild kits which will include the gasket, rubber plug, and float valve assembly... And as of today, i will need at least 2 choke plungers.
SUMMARY:
Needed parts:
2-3 sizes main jets.. 135-150 range (thinking 145, 147.5, 150, 155, 160 x 4 each) -- Dynojet is showing a 155 and 160
Jet needle x4 (adjustable)
Needle Jet x4 (do I need differing sizes? increase size of main jet, decrease size of needle jet)
Pilot jet x 4 (size question as well)
float valve with gasket and bottom rebuild x 4 ( gasket , rubber plug, screen, etc)
alos need at least 2 choke plungers-- bad happening yesterday left me drilling one out and getting one out leaving bad marring on the head)
Thanks all for the read! I did search and found little as far as carb resourcing goes... CHeers!!
Michael H
Mobile, AL
Now, they are ready to rock... so I thought... I pulled all the parts and detailed what I now had and what I wanted. After doing research and research, I contacted Mikesxs.net. They specialize in XS650's and he sells BS34 parts and all the needed things I need. After an email, he came back saying sorry, he only supplies XS's... pfft.. whatever... thanks for the help.. Just trying to give him business. So, last night, I put my hands on my carbs and tried pulled the choke... ummm... stuck? but I just cleaned 'em and made them all pretty and nice... Conclusion of this left me grasping the head of the choke plunger of two of the carbs--- vice grips, tried to twist and slightly break free the plunger, and.. SNAP! one head broken off. This left me taking the 4 carb assembly apart. It took me longer than expected to figure out how to take the choke off. Worst of the worst happened.. I ended up having to drill the plunger out since it broke off a second time inside at the larger cylinder plunger portion. I drilled, tapped, and finally pulled the plunger cylinder out. I then had to fine sand the internal casting and polish it to the stock luster... wheww... scary indeed..
Conclusion: I am ready for parts and have yet to find them.
What I have found installed:
Main jets-- 122.5 AND 127.5 (2 of each-- never seen this before, is that right?)
Jet Needle- 5C50 (have yet to find many needle specs that include this 5 series Mikuni needle--started using it 1981 if i remember correctly)
Needle Jet-- 476-Y5 (havent found too much on this Y5 either)
Pilot jet-- 37.5
Float valve-- 2.5
Now onto jetting. I would like to buy a few sizes of the main jets so I can go through my troubleshooting and tuning for this engine with K&N individual pods and aftermarket 4 into 1 exhasut. I would also like to get the Canadian spec adjustable Jet Needles for finer tuning of my midrange since I will be buying the larger Mains. I wouldnt mind getting new needle jets as well--are there size differences i need to be aware of? I will want to potentially buy a few different sizes pilot jets as well, but I will definitely need replacements on my current 37.5's (whether with those or different sizes) since at least one of the heads is gouged and potentially irreplaceable. With the float valves, I will just buy rebuild kits which will include the gasket, rubber plug, and float valve assembly... And as of today, i will need at least 2 choke plungers.
SUMMARY:
Needed parts:
2-3 sizes main jets.. 135-150 range (thinking 145, 147.5, 150, 155, 160 x 4 each) -- Dynojet is showing a 155 and 160
Jet needle x4 (adjustable)
Needle Jet x4 (do I need differing sizes? increase size of main jet, decrease size of needle jet)
Pilot jet x 4 (size question as well)
float valve with gasket and bottom rebuild x 4 ( gasket , rubber plug, screen, etc)
alos need at least 2 choke plungers-- bad happening yesterday left me drilling one out and getting one out leaving bad marring on the head)
Thanks all for the read! I did search and found little as far as carb resourcing goes... CHeers!!
Michael H
Mobile, AL
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