Author Topic: Carb spring (Read 1513 times)

aminemed · « **on:** February 18, 2018, 02:17:02 AM »

Hi

Pulled out my carbs but cannot figure out how to reconnect the spring bikr is a 750 k2

Attached the pictured, maybe i lost something while opening the carb

Mushu · « **Reply #1 on:** February 18, 2018, 02:29:18 AM »

There is just a small plate inserted between carb 2 and 3 in the holes corresponding to T fuel entry for carb1-2 or 2-3.
Spring can be attached to the plate.
You should be able to locate it on the spare part list.

Bad news, you will have to unscrew carbs to insert the plate

Yamahawk · « **Reply #2 on:** February 18, 2018, 02:55:45 AM »

+1 I had the same problem when I got my K1, the small plate was there, but not between the carbs in the holes. It was just wedged under the float bowls lol... I found out where it went, and had to separate the middle two carbs to insert it back in. Then, I installed the spring, and good to go!
Charlie

aminemed · « **Reply #3 on:** February 18, 2018, 03:04:36 AM »

Thank yiu for your help

I think im going to fabricate my own plate too expensive to order it

aminemed · « **Reply #4 on:** February 18, 2018, 03:14:23 AM »

Just one more question

Can i temporarily attach the spring to my float bowl like in the picture ?

PeWe · « **Reply #5 on:** February 18, 2018, 03:17:03 AM »

Find the correct plate or make one. It is just 1 mm thick steel plate with a hole

Honda spring is too tough.
- Anyone that has found a softer alternative?
Still able to retract the throttles with fresh top seals that add a little extra friction.

Yamahawk · « **Reply #6 on:** February 18, 2018, 03:22:34 AM »

Quote from: aminemed on February 18, 2018, 03:14:23 AM

Just one more question

Can i temporarily attach the spring to my float bowl like in the picture ?

You can make a tab for your spring out of some thin plate, either steel or aluminum. Just be sure to measure correctly for it to fit inside those two center carbs. And, no that spring would most likely pop out of one side or the other, where you want to put it. That's why they installed the little two sided tab bracket in the holes, with the spring hole drilled in the middle. It would be unsafe to have that spring pull out under throttle hehe... Especially if you had removed the push throttle cable...
Charlie

Gamma · « **Reply #7 on:** February 18, 2018, 08:58:57 AM »

Here's a pic to help

aminemed · « **Reply #8 on:** February 18, 2018, 11:27:13 AM »

thank you guys i ended up fabricating my own plate with 1mm steel very quick and easy with your advices !

aminemed · « **Reply #9 on:** February 24, 2018, 06:38:01 AM »

Guys i have a question:

I installed the spring plate and attached the spring. When i pull the throttle and just release it, should it go back to initial position thanks to the spring? In my case, when throttle is opened then released, it remains in its position.

Yamahawk · « **Reply #10 on:** February 24, 2018, 06:58:59 AM »

Sounds like your cables are not hooked up correctly. Do you have the two cables on your throttle tube at the handlebar? And if so, are they correctly hooked up the the throttle linkage? There is the place to look, and also at your spring connection... and I assume the 'it' in your post is the throttle tube? Or is it the linkage? And you twist the throttle, not pull it... there is a push/pull throttle on all our SOHC bikes, with 2 cables. If this is not correctly installed, it could be the problem. Can you post a picture of the plate you made, and where you put it?
Charlie

aminemed · « **Reply #11 on:** February 24, 2018, 08:57:57 AM »

Ok in your bike when you pull the throttle to ride the bike and then when you release it, is your throttle at the handlebar grip level, goes back to its initial position or does it stays open. In my case, when i pull the throttle, handlebar grips remains in pull position so does the carbs. I need to push back at handlebar level so that i close my carbs. Is that correct ?

evinrude7 · « **Reply #12 on:** February 24, 2018, 09:08:51 AM »

it should snap shut.

Yamahawk · « **Reply #13 on:** February 24, 2018, 09:20:03 AM »

^^^ +1
It should snap shut by your spring pressure. The one in your picture looks like it is hooked up properly. So it has to be something binding, either in your cables, or in the linkage of your carb bank. If you remove your cables, do they slide freely in the sheath? also, when you work the carb linkage with the cables removed, by the tab where you idle screw is, do they rotate hard against the spring, and then snap shut? They should...
Charlie

aminemed · « **Reply #14 on:** February 24, 2018, 09:27:26 AM »

No they dont when i remove my carbs and push the tab by which my idle screw as if i m pulling my throttle they dont snap shut. They remain in open position and the spring is not pushing it back

aminemed · « **Reply #15 on:** February 24, 2018, 12:13:03 PM »

Here is a picture when i pull the carbs as you see they do not snap shut

Yamahawk · « **Reply #16 on:** February 25, 2018, 04:18:36 AM »

Quote from: aminemed on February 24, 2018, 12:13:03 PM

Here is a picture when i pull the carbs as you see they do not snap shut

Ok... I'm thinking you have a bent throttle shat on the left side as you look at the picture. It should snap shut, but there is evidently a bind somewhere on your throttle shaft. It may be your shaft is bent, or one of the rods that pull your slides is tweaked. Start looking at the rotation of the shaft, and see if something looks out of round or bent as you move the linkage.
Charlie

aminemed · « **Reply #17 on:** February 25, 2018, 12:02:23 PM »

Ok i figured it out: it was the tab that i fabricated, too long and was bending the 3rd carb when i was screwing the carbs tabs all together

PeWe · « **Reply #18 on:** February 25, 2018, 01:43:55 PM »

Otherwise some mechanical obsctructing the throttle release The spring is very hard so it will return very quick and hard, maybe too hard. Wrong routed or cable in a sharp bend can be one reason.
You might find something here
http://www.hondachopper.com/garage/carb_info/bench_sync/bench_sync.html

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Author Topic: Carb spring (Read 1513 times)