1983 VF750c carbs

[teebee]

Was given a 1983 750 Magna in non running condition with some parts scavenged off. The carb assembly looks good, except throttles will not rotate (gummed up pretty good). Would like to rebuild carbs, but can't get past step #1 - removing the airbox to carb screws without destroying the whole thing. Anybody have any tricks that might help in removing the screws. I tried a little heat, but afraid to use too much for fear of damaging the diaphrams and other non metal parts. Thanks in advance.

[dgc67]

You need an impact driver.  IMO it is an essential tool for wrenching on motorcycles and doing brake jobs on cars as well.
You can try using a break-over bar and tapping it with a hammer as you try to turn but having the tool is the way to go.
http://www.google.com/products/catalog?hl=en&rlz=1G1GGLQ_ENUS364&q=impact%2Bscrewdriver&oq=&gs_rfai=&um=1&ie=UTF-8&cid=13103585459197592704&ei=jK6nS4DGAs2QtgfVoK3qAg&sa=X&oi=product_catalog_result&ct=result&resnum=2&ved=0CBgQ8wIwAQ#ps-sellers
Where are you located in the world?

[lragan]

You need an impact driver.

Second that!  Well worth the $$ in saved busted knuckles...

[teebee]

You need an impact driver.  IMO it is an essential tool for wrenching on motorcycles and doing brake jobs on cars as well.
You can try using a break-over bar and tapping it with a hammer as you try to turn but having the tool is the way to go.
http://www.google.com/products/catalog?hl=en&rlz=1G1GGLQ_ENUS364&q=impact%2Bscrewdriver&oq=&gs_rfai=&um=1&ie=UTF-8&cid=13103585459197592704&ei=jK6nS4DGAs2QtgfVoK3qAg&sa=X&oi=product_catalog_result&ct=result&resnum=2&ved=0CBgQ8wIwAQ#ps-sellers
Where are you located in the world?

Thanks DG, I am in Michigan. I do have an impact driver, but I refrained from using it for fear of damaging the carbs from the impact. They are somewhat delicate I think. But I will try the "tap while turning" method with a helper. Thanks

[Chad in Michigan]

where abouts in Michigan? I am near Lansing.

[teebee]

where abouts in Michigan? I am near Lansing.

Southgate, 20 miles south of the big D.

[dgc67]

I used it on mine with no problems/damage to the carbs.  I just set them on a board and did not hit real hard.  Just takes one rap with that tool, most of the time.

[roboto65]

You will not hurt the carbs with a screwdriver impact driver that is your best tool against soft Japanese screws just whack it once with the hammer and it will be loose maybe twice LOL  Use it before you really mess the screws up and cannot get the bite it needs.. 

[dgc67]

Use it before you really mess the screws up and cannot get the bite it needs..

Ditto!!  I went ahead and replaced mine with Allen/hex heads.

[silveradocowboy]

Maybe I missed something but if you just need to clean the carbs you don't need to remove the carbs from the airbox. Just remove the diaphrams, jets and floats to give it a good cleaning.

[dgc67]

Very good point

[teebee]

I finally was able to remove the carb to intake screws. What a dumb@#$%. I remembered my wife bought me a craftsman 19 volt cordless drill that came with a separate 1/4" drive impact driver. I had never used it because it was for small projects, so I kinda forgot I had it. THE PERFECT TOOL. Chucked in my best fitting phillips bit. They came out like nothing - very easy. I finally found a good use for this tool. Hopefully this might help someone else out. Good tool to have if you work on your own bike. Alway running into stubborn screws. Thanks to all the replies.

[mark_gober]

Teebee,

Let me know if you have any questions.  I just rebuilt the carbs on my 1982 Magna.  I got one in much the same condition yours is in.  I'm actually going to have to tear them apart again because I have one that doesn't synchronize and the vaccuum slide isn't working.  I think it's gummed up so I'm tearing it apart this week for another cleaning job. 

Mark

[Charles S Otwell]

Check close for a cracked diaphram..