Broken throttle return cable or spring? - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 12 (permalink) Old 06-18-2019, 10:30 PM Thread Starter
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Broken throttle return cable or spring?

I was riding my bike this even when decelerating at a red light I felt a pop on the right side of the bike by the air box.

After that pop, my bike doesn't decelerate normally when letting off the throttle.

The only things that immediately come to mind are either a broken throttle return cable or something else in the throttle body, since the bike accelerates just fine.

What do you guys think?

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post #2 of 12 (permalink) Old 06-18-2019, 11:12 PM
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Take the air cleaner out of the way and eyeball the throttle drum operation when you move the throttle grip. You need it to return to idle for safety.


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post #3 of 12 (permalink) Old 06-18-2019, 11:41 PM
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One other possibility. I put on new grips and when fooling around with the throttle cables I must have dislodged some rust, end result was my throttle wouldn't go back to idle. I ran rust buster down the cables and they were very rusty. After that I ran oil down the cables, problem solved and everything is working just fine.



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post #4 of 12 (permalink) Old 06-22-2019, 10:36 AM Thread Starter
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I got the air box off the bike and it looks like the throttle is opening and closing properly.

In neutral the bike revs up and down as expected.

Where's the next place I should look to see why my bike isn't engine braking properly?

Something happen to the transmission that caused the pop?

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post #5 of 12 (permalink) Old 06-22-2019, 12:30 PM
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Quote:
Originally Posted by pnkfld7892 View Post
I got the air box off the bike and it looks like the throttle is opening and closing properly.

In neutral the bike revs up and down as expected.

Where's the next place I should look to see why my bike isn't engine braking properly?

Something happen to the transmission that caused the pop?

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Should have shot a vid when you did that, we might see/hear something that would give a nice clue

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post #6 of 12 (permalink) Old 06-22-2019, 02:30 PM Thread Starter
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Originally Posted by Big Shrek View Post
Should have shot a vid when you did that, we might see/hear something that would give a nice clue
I'll shoot a video when I get my replacement airbox in.

A Previous owner cross threaded one of the screws for the cover so bad that I had to twist the brass insert out of the plastic.

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post #7 of 12 (permalink) Old 06-30-2019, 01:06 PM Thread Starter
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I got my replacement airbox in and got the bike put back together.

I'm starting to think it's an issue in the clutch.
I can get some engine braking in 1st and 2nd but in 3rd 4th and 5th, when I let off the throttle I get almost no engine braking, it just feels like the clutch is open. But I can still accelerate pretty much as normal.

The video I took of the engine running with the airbox open is too big to post.

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post #8 of 12 (permalink) Old 06-30-2019, 01:32 PM
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Does it feel like it is popping out of gear into neutral, until accelerated? Is it jerky on decel and accel?


Can you see any hoses that may have split or fell off?
Sometimes a lean mixture from a vacuum leak will cause a delayed decel.

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1983 750 Shadow
From the past=
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1962 Honda 305 Dream
1965 Honda 305 Dream
1971 Honda 175 scrambler
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post #9 of 12 (permalink) Old 06-30-2019, 03:00 PM Thread Starter
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Quote:
Originally Posted by swifty2014 View Post
Does it feel like it is popping out of gear into neutral, until accelerated? Is it jerky on decel and accel?


Can you see any hoses that may have split or fell off?
Sometimes a lean mixture from a vacuum leak will cause a delayed decel.
It doesn't feel like it's popping out of gear, just not engaging after the throttle is let go, it's kind of hard to describe what it feels like.

I had the tank off to get the air cleaner back on and fro what I could tell nothing was disconnected. I made sure to hook up the vacuum tube for the petcock and the small diameter hose on the back right corner of the tank.

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post #10 of 12 (permalink) Old 06-30-2019, 03:44 PM
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A pop in the air box or below it? My box pops occasionally after i cut the resonators off. Thats just from a back pressure loss tho. Tranny shouldn't have anything to do with airbox, but if the pop came from below, then you should pull your cover off and check the teeth on the clutch assymbley. Plenty of vids on YouTube to follow without pulling the motor

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