Engine Bog Unless Brake is Engaged?

RKHiPerformance · Post by **RKHiPerformance** » Wed Jul 26, 2006 8:47 am

We have a 1986 Honda Spree with 2500 miles on it. It recently developed a problem that we have been unable to resolve.
With the rear brake lever pulled in, it starts easily and idles well. But when the rear brake lever is released, the engine begins to chug as if it will stall, and opening the throttle results in a severe bog. When the rear brake lever is pulled to re-engage the brake, the engine speed climbs as expected and the problem goes away.
How can it be that the brake lever must be pulled for the engine to run properly? Is there some electrical connection, or do we have a problem with the clutch? We have removed and inspected the exhaust, replaced the ignition coil, wire, and plug, all with no change.
This problem has made our Spree unusable. Any ideas?

Thanks for the help,
Rick & Kristi

Farfignugin · Post by **Farfignugin** » Wed Jul 26, 2006 4:52 pm

there is a switch for the break light on both break leavers (switch is also for starting cercuite (electric start)) If your problem persists with BOTH break leavers (happens on either one or both) then i would say you have a short somewhere. Thats just my oppinion though, someone else may say different.

berreta22 · Post by **berreta22** » Wed Jul 26, 2006 5:06 pm

only the left brake is part of the circuit. Right brake has nothing to do with it.except it makes the brake light come on..but thats it

Farfignugin · Post by **Farfignugin** » Wed Jul 26, 2006 9:58 pm

no... the front break runs the same electrical cercut as the back break, try it if you don't believe me! Ask anyone on the forums, I've started my scooter many times with JUST the front break engaged. So check your info. before you post.

MySpree · Post by **MySpree** » Wed Jul 26, 2006 10:02 pm

yea man ur messed, dont try to correct people that kow alot more then you farfignugen sis right, there both in the same circuit. smart one.

berreta22 · Post by **berreta22** » Wed Jul 26, 2006 10:33 pm

yea youre right.. i keep forgettin my spree brake set up is not stock. Sorry for the mix up. (dont ask about the set -up i got it this way) just too lazy to switch it around and fix it

RKHiPerformance · Post by **RKHiPerformance** » Sun Jul 30, 2006 10:12 am

I drove the scooter the other day and determined that it runs better if either brake is lightly applied.
If either brake is just barely applied, the scooter runs normally and will accelerate up to it's usual top speed. If I release the brake, the engine immediately stumbles and misses.
What possible ignition component could rely on the completed brake light circuit to function? Is there a common ground, perhaps?
Can anyone direct me to a good wiring diagram?

Thanks for the help,
Rick

Post by **noiseguy** » Sun Jul 30, 2006 12:36 pm

Ah, how about d/ling the factory service manuals from this site, under tech docs? Wiring diagrams there.

CudaDon · Post by **CudaDon** » Sun Sep 03, 2006 9:41 pm

Did you ever get this problem fixed??

Spirit of 95 · Post by **Spirit of 95** » Mon Sep 04, 2006 12:14 pm

I am having the same exact problem. You are not the only one. I would list my symptoms but your are the same.

Gamemedic · Post by **Gamemedic** » Mon Sep 04, 2006 1:32 pm

You have a bad ground in the rear of the scoot. Your cdi, lights starter, etc. all share a common ground. The scoot has 3-4 points its grounded to the frame. When you pull the brake, the break light in the back of the scoot completes the circut to your cdi. When the light is off you have a weak or broken ground to the cdi causing it to run bad. Find the ground wire going to the cdi(on the connector) and jump it right to the ground on the batt. That is the only thing I can think of, I was looking at the schematic and this seems to be the only logical theroy....