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Old 06-14-2010, 06:10 PM   #1
thamann2
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Default 87 Honda Magna, Troubles with ??

Hey guys,

I just bought an 87 Honda Magna 700, beautiful condition and it has been stored for the past year in heated storage. I changed the oil and the gas today and i can only start it when the choke is on. As soon as i take the choke off it dies. Also, as soon as i touch the throttle the bike dies as well. It only runs when the choke is on and when it runs , it stays at a nice steady idle. Any suggestions? I am hoping its not a carb problem b.c that can be pretty costly..$$$ Thanks,

-Tom
Boston, Ma
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Old 06-14-2010, 06:46 PM   #2
The_AirHawk
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Sorry to say, that IS a carb problem - classic symptom of gas turning to varnish inside the carbs, then plugging-up the idle jet(s).

Good News is, it's a fairly straighforward fix - Bad News is, you've got Work ahead of you if you're gonna fix it yourself.

Step #1: Invest in a Shop Manual.

Finish that step, then get back with us.
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Old 06-14-2010, 10:46 PM   #3
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Try draining the gas and refilling with fresh and see if it's just bad gas. Gas turns bad in a few months unless stabilizer is added. There are little screws on the float bowls you can loosen to drain the old gas from the carbs. place a towel underneath to catch the gas and do not try to start the bike until all spilled gas has completely evaporated.

If new gas doesn't fix it than the carbs will need to be pulled and disassembled and cleaned. You can do it yourself if you get the Clymer manual. If you have a shop do it it will cost boocoo bucks because the carb assembly is so damm hard to remove and will require lots of shop hours. I had a Magna and it took me about two hours just to pull the carbs. Figure 6 hours shop time plus parts unless you do it yourself. Unfortunately the Magna is one of the hardest bikes to work on I ever encountered in 46 years of maintaining bikes.
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Last edited by seruzawa : 06-14-2010 at 10:51 PM.
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Old 06-14-2010, 10:53 PM   #4
Buzglyd
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Would it be prudent to hold a Zippo under the carbs to see if there is any varnish?
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Old 06-15-2010, 06:27 AM   #5
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Quote:
Originally Posted by Buzglyd View Post
Would it be prudent to hold a Zippo under the carbs to see if there is any varnish?
Only if it's well-polished, and you're using it for a mirror.........
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