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Fist Time Rider - Issues with Idel and Throttle

Fuel System: Gas (Petrol) tanks, Carburators
pwilke1
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Fist Time Rider - Issues with Idel and Throttle

Post by pwilke1 » Mon Oct 26, 2009 10:58 pm

Hi. I've recently picked up a 66 Honda Dream which I was told was road ready. Unfortunately it seems I've run into (hopefully) a small issue with the throttle/carburetor. (Note: This is my first bike so I'm rather limited in the technical knowledge)

The Issue: After cranking the bike, it idles really high. My first though was this was due to the throttle being stuck. Although there was some slight sticking with the throttle, I was able to take it off and free it up. The bike is not topping out in the high idle as I have some play to rev it up, but rom what I can tell though it is well above where it is supposed to be. I'm not sure if the problem could still be linked to the throttle but I'm still having some issues with. Even after freeing it up, it doesn't snap back after opening it up. Before buying the bike I was told the carburator had been cleaned/rebuilt and that I would probably need to adjust the throttle before taking it for a ride. Being a beginner I obviously would really like to get these issues fixed before I hop on.

I do have the Clymer Honda Service and Repair manual but I'm not sure what to look into first. Any help would be greatly appreciated!

-Patrick

Dgormley
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slide adjust screw

Post by Dgormley » Tue Oct 27, 2009 12:29 am

Wilke, try the slide adjust screw(the one protruding from the carb body) unsrew it a bit..........D

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brewsky
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Post by brewsky » Tue Oct 27, 2009 3:49 am

If that doesn't work, the cable is probably in a bind somewhere it makes a bend.
Turn the hanldebars full right and left wile idling and see if the idle speed changes.
If so, it is definitely a cable issue.
Follow it from the bars to the carb and you will probably find out where.
66 dream, 78 cb750k, 02fz1, 09 wing

pwilke1
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Joined: Mon Oct 26, 2009 9:21 pm
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Post by pwilke1 » Tue Oct 27, 2009 8:04 am

Thanks for the advice! I'll try both of these suggestions this evening. Hopefully the fix will be this easy. Do the dreams have a spring return for the throttle? I didn't find anything about it in my service manual suggesting it did. I know I'm supposed to have more of a return than I do (when I open it all the way up it stays) but I wasn't sure if it was supposed to necessary "pop" back like newer bikes. I tried adjusting the throttle grip adjuster but so no difference in the return.

-Patrick

Dgormley
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Post by Dgormley » Tue Oct 27, 2009 9:11 am

Patrick, yes there is a return spring, I would guess it's the cable, slide or spring also, try loosening the carb to manifold bolts a tad(they should be just a little more than finger tight) if they're too tight that will bind the slide.....................D

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brewsky
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Post by brewsky » Tue Oct 27, 2009 9:13 am

There is no return spring other than the slide return spring in the carb which is too weak to give that "popping" return action of other bikes.
My 63 sportster had NO return spring of any kind with a similar grooved twist grip mechanism and stayed open in whatever position it was left in when you removed your hand.
Safety wasn't as big an issue back when.
66 dream, 78 cb750k, 02fz1, 09 wing

pwilke1
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Post by pwilke1 » Tue Oct 27, 2009 8:30 pm

Thanks for all the suggestions. One problem solved (I think) another one continues! I was able to finally get the bike to idle at a more normal level. I am however still having issues with the throttle. After taking it off/apart for the 10th time I realized the cable it self is sticking when fully open. Also it's still a little stiff but I'm assuming that's: 1) Due to the age of the bike 2) Whatever issue is causing the throttle cable to stick on full. I tried adjusting the the carb to manifold bolts but saw little to no changes. I've messed with the throttle adjustment from all the way open to all the way closed with no solution. I'm thinking the next step would be to completely replace the throttle cable. Any chance this could solve the issue? Would a newer cable also make the throttle open a little smoother? Being a new rider I'd hate to get on the bike with a potential stuck throttle! If I purchase a new cable, do I need to go with a particular type/kind/size? How tough of a job am I looking at if I do decide to replace the cable? I apologize if these are senseless questions but I'd like to do this correct the first time.

-Patrick

Edit: To better explain this, took a short video of the issue I'm having. http://www.youtube.com/watch?v=G1boo_ijsN8

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