Quantcast
Jump to content

Recommended Posts

Posted

Can somebody help me? I am actually working on my three wheeler and I don’t know what to do: I can’t shift gears. I think it’s in reverse (because I can’t move forward but I can move backwards) but I can’t shift to any other speeds not even the neutral. 

Posted

I would try rocking it back and forth while shifting to see if it comes out of reverse, if not under the right crankcase cover you will see the centrifugal clutch and the clutch basket, just to the lower left of the clutch basket is the shifter mechanism, if its stuck there you may have to apply a little, very little, force to unstick it, if its stubborn just keep working back and forth it might come free.

Posted

It's been a long time since I've seen one of those, but it will be as Gw says and something in the shift mechanism rather than the clutch.

First off I'd check there isn't some lever or cable that has to be used to put it into reverse.. That part might be playing up and stopping the shift lever from moving.. perhaps.

If it's not a designed shift lock, then I'd try rocking it backwards and forwards while trying to get the shift lever to move. Sometimes we have to push the bike quite hard in one direction or the other to get the engine to turn and allow a shift to happen. Decpmpressing the engine will help, or, jack the back wheels up and turn them while trying to move the shift lever.

If that doesn't work, describe how the shift lever behaves/feels.. is it solid and not move at all, does it move freely but do nothing, does it move the usual distance both ways, does it self center ?

  • Thanks 1
Posted (edited)

I've looked at several years now and no reverse..  Seems more likely it can only be pushed backwards, which could be because it's in gear and the over-run/sprag clutches won't let it go forwards, or, the brake is playing up, loose lining on the shoe perhaps..

Edited by Mech
Posted
20 hours ago, Mech said:

Oh..  The manual I just looked in says that bike doesn't have reveres. Does it have reverse gear?

And are you saying it drives in reverse ? Or that you can only move it backwards ?

I can only move it backwards but I manager to put it in neutral. You’re right, there is no reverse, I checked in the user’s manual but how is it possible that it does not move forward but can move backwards?

Posted
20 hours ago, Mech said:

First off I'd check there isn't some lever or cable that has to be used to put it into reverse.. That part might be playing up and stopping the shift lever from moving.. perhaps.

 

where would this lever/cable be if there is one?

Posted
19 hours ago, Mech said:

I've looked at several years now and no reverse..  Seems more likely it can only be pushed backwards, which could be because it's in gear and the over-run/sprag clutches won't let it go forwards, or, the brake is playing up, loose lining on the shoe perhaps..

lIndeed, there is no reverse. I'm pretty sure it's not the brake that is playing up,  the wheels are completely blocked when i try to move forward. Where is the over-run/sprag clutch and what is it's fonction?

Posted
21 hours ago, Mech said:

It's been a long time since I've seen one of those, but it will be as Gw says and something in the shift mechanism rather than the clutch.

First off I'd check there isn't some lever or cable that has to be used to put it into reverse.. That part might be playing up and stopping the shift lever from moving.. perhaps.

If it's not a designed shift lock, then I'd try rocking it backwards and forwards while trying to get the shift lever to move. Sometimes we have to push the bike quite hard in one direction or the other to get the engine to turn and allow a shift to happen. Decpmpressing the engine will help, or, jack the back wheels up and turn them while trying to move the shift lever.

If that doesn't work, describe how the shift lever behaves/feels.. is it solid and not move at all, does it move freely but do nothing, does it move the usual distance both ways, does it self center ?

I succeeded to put it in neutral but i'm still not able to go to the 1's, 2's, .... 5's speed. 

Posted

The cable or lever was only if it had reverse. It won't have one.

So now it's in neutral, but it only pushes backwards, right ? You can't push it or drive it forwards..  right ?

I'd guess that would be a brake playing up. You could drop the drive chain off it and try turning the back wheels then. Or jack the front end and try turning that wheel.

Posted
On 4/23/2023 at 3:38 PM, Mech said:

The cable or lever was only if it had reverse. It won't have one.

So now it's in neutral, but it only pushes backwards, right ? You can't push it or drive it forwards..  right ?

I'd guess that would be a brake playing up. You could drop the drive chain off it and try turning the back wheels then. Or jack the front end and try turning that wheel.

i'm pretty sure it's not the brakes, it blocks completly and if I try pushing it forward, it's making a sound like two gears rubbing because they can't support the force a bit like if you put reverse while moving forward. I figured out how to move forward by rocking it back and forward so now it's in neutral i guess because i can move forward and backward. There is still something wierd: the others gears are when i downshift but it's supposed to be the opposite.        Sorry for the wait, I wasn't able to send the message. 

Posted
On 4/23/2023 at 3:38 PM, Mech said:

The cable or lever was only if it had reverse. It won't have one.

So now it's in neutral, but it only pushes backwards, right ? You can't push it or drive it forwards..  right ?

I'd guess that would be a brake playing up. You could drop the drive chain off it and try turning the back wheels then. Or jack the front end and try turning that wheel.

I forgot to mention that when i'm engaged on any gears other than the netral, I can't move forward and only backward. I don't know if it's possible but maybe the whole gear system is upside down. 

Posted

Ok, well since it's now going back and forwards, it must have been in gear before, and the sprag clutch was what prevented it going forwards.

The sprag clutch is a one way clutch that provides engine braking when the engine revs get low enough for the centrifugal clutch to disengage. Normally the centrifugal clutch locks up and crank and gearbox shaft turn at the same speed, but if you are going down a hill with the throttle off and the engine gets slow enough, the centrifugal clutch disengages and the bike tries to run away down the hill. If the gearbox shaft is turning faster than the engine shaft after the centrifugal clutch has disengaged, the sprag drives the engine shaft forwards and provides engine braking. At idle, before the centrifugal clutch locks up,  the engine is turning faster than the gearbox shaft and so the sprag slips. When the engine shaft isn't turning because the engine is stopped, then any rotation of the gearbox shaft is faster than the engine shaft and so the sprag tries to turn the engine, which in low gears seems like it's locked up.

I suspect you still have the bike in between two gears, but not in the proper neutral place. Between third and forth perhaps..  I think you need to keep rocking the bike backwards and forwards, while pushing the shift lever down, and keep rocking and tapping the lever till eventually it will shift down one gear at a time to the proper neutral. It will probably take a lot of rocking..

 

Posted

Also note your shift pattern.  Not sure on the '82 but lots of these things are pull up on the lever to shift down. Makes a lot of sense right? Do you have a charged battery in it and does the neutral light work? I would sit on it, rock it back and forth while pulling up on the lever until it kind of clicks into place. Release the lever and then do that again, and again, and again until it feels different and won't click. That is either neutral or high gear. If the key is on, the battery is charged, and your neutral light works then it should be glowing, if not push it backwards or forwards and see if it rolls easy. If it doesn't try pushing down while rocking instead of pulling up. Also of note, when you're shifting and it's in that "clicked" position, your gears aren't engaged, so it's like a neutral spot between gears. Comes in handy if you need to push start them, mine at least would just lock the tires up in 1st gear, but if you put it in first, then held it in that position between first and second while you pushed it and got up some speed, then jumped on it and released right as you landed on the bike you could get it to turn over and go. Hills help.

Sorry for the random tangent.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Forum Topics

    • By hengstserepair
      Howdy ya'll. I am working ona 2000 Yamaha Breeze 125. It was in rought shape when I received it and I am working through issues as they pop up. The quad had been sitting for years. I was able to get her running again, but I need your help with the following issue:
      I don't trust the transmission yet and I don't want to make problems any worse. So, I haven't pushed things hard at all. Low rpms, less than 5mph in reverse.

      Nuetral: Runs as expected
      Reverse: She seems to be driving fine at slow speeds. Going into reverse at idle is fine, coming out of reverse back into neutral won't work (the shifter is just stuck). As soon as I turn off the quad, I am able to shift around without any issue.
      Forward: It slips. It seems to only transfer power to the wheels on a smooth surface and going slightly downhill. When shifting into forward at idle, there is a clacking sounds during the transition. Shifting back to nuetral works just fine.

      Other Notable Symptoms: There was old oil in the vbelt and when I was tuning the carb, it starting blowing out of the CVT cooling vent at the front of the quad. Made quite a mess. There is positive crankcase pressure due to piston blowby, that I have not decided whether or not I am going to fix (customer budget dependant).  Since the oil was old, much darker than the new oil that is in the crankcase, I am thinking it seeped past a bad seal while it was sitting for years. The oil that was in it when I first got it had gas in it.

      Thoughts: I am thinking maybe there is an issue with the clutch. I worry about the old oil intermingling with the dry centrifugal clutch. I was thinking my next step would be to take the cover off of the clutch and inspect it.

      Let me know what you all think. Any advice and ideas is greatly appreciated. This is only the 3rd quad I have worked on and I have a lot to learn.

      Lorne
    • By vaneleus
      I've been hunting for a rebuild kit or aftermarket replacement without success. Any tips? The OEM replacement is too rich for my blood. 
    • By jeffrocdx
      I'm working on a 2002 Polaris Sportsman 400 with shift indicator problems. The indicator panel only will show Neutral and Reverse. If it's in High or Low, the indicator will show "R".
      I have replaced the three position indicator switch on the transmission. There is also a two position switch on the tranny that I didn't replace. If anyone is familiar with this problem, please let me know what I need to do. Any help is greatly appreciated!
    • By sandman001
      This 2006 ArticCat dvx400 didn't have a reverse cable. I got one and am wondering how it routes? If someone has a dvx400, could post a pic of there reverse cable routing, it would be greatly appreciated. Thanks
    • By Rockbottom
      Replaced stator now red reverse light stays on in all forward gears and when neutral light in on 
      When put in reverse the light goes out
      any ideas how to correct
      thanks ahead
       
       
×
×
  • Create New...