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Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

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  #11  
Old 30th August 2019
ken883/1200 ken883/1200 is offline
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Join Date: Jun 2019
Location: Fingerlake Area
Posts: 51
Sportster/Buell Model: 883/1200
Sportster/Buell Year: 1992
Sportster/Buell Model #2: Sportster 883/1200
Sportster/Buell Year #2: 1988
Other Motorcycle Model: Yamaha XS 650
Other Motorcycle Year: 1982
Reputation: 10
ken883/1200 is an unknown quantity at this point
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Quote:
Originally Posted by needspeed View Post
If you're going to be buying aftermarket gears Andrews brand are considered by most people to be the best and even better than stock HD gears. 4 speed sportsters have 2 gears that have 20 teeth and have been known to break causing major transmission and case damage. Replacing those with the stronger Andrews is highly recommended. Lots of venders sell them. One being JP cycle.
Had two bad transmission gear failures with my 1988. First time was under warranty! Believe it was second gear. Then next time as I recall it was third gear. When that one went I did replace the damaged gears with Andrews and also installed a low ratio first gear kit as I was pulling a sidecar. That was at around 36,000 mile now is close to 120,000 miles.

Also note the shifter forks, at least back in 1988, come in three offsets.
Standard, +0.020 and -0.020. So it's best that you have the manual and the alignment tool to hold the shafts in position so you can measure to see if yours is in spec or you need one of the others
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  #12  
Old 31st August 2019
iNSaNeSHaNe's Avatar
iNSaNeSHaNe iNSaNeSHaNe is offline
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Quote:
Originally Posted by sglock45 View Post
pulls hard till upper rpms then slips or goes into a false neutral let off the throttle and it goes back into 2nd
This is why I say clutch .. weak spring or coated plates from the gear oil in the trans...

Was this happening before you changed the primary fluid or after..

I had a trans do something similar and was the finger rollers were shot.

Good luck with it.
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  #13  
Old 31st August 2019
ken883/1200 ken883/1200 is offline
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Join Date: Jun 2019
Location: Fingerlake Area
Posts: 51
Sportster/Buell Model: 883/1200
Sportster/Buell Year: 1992
Sportster/Buell Model #2: Sportster 883/1200
Sportster/Buell Year #2: 1988
Other Motorcycle Model: Yamaha XS 650
Other Motorcycle Year: 1982
Reputation: 10
ken883/1200 is an unknown quantity at this point
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Quote:
Originally Posted by iNSaNeSHaNe View Post
This is why I say clutch .. weak spring or coated plates from the gear oil in the trans...

Was this happening before you changed the primary fluid or after..

I had a trans do something similar and was the finger rollers were shot.

Good luck with it.
Ok, then my question for the OP would be does this "false neutral" situation happen in third or even forth gear?

If it is the clutch slipping it should happen in all the higher gears and even worse as you go up in the gears.

Had a clutch problem with my 1992 five speed and you would only notice it in fifth gear pulling a hill and then only if you were watching the tach. You would notice the RPMs start creeping up while the speedometer stayed steady at one speed.
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  #14  
Old 31st August 2019
ken883/1200 ken883/1200 is offline
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Join Date: Jun 2019
Location: Fingerlake Area
Posts: 51
Sportster/Buell Model: 883/1200
Sportster/Buell Year: 1992
Sportster/Buell Model #2: Sportster 883/1200
Sportster/Buell Year #2: 1988
Other Motorcycle Model: Yamaha XS 650
Other Motorcycle Year: 1982
Reputation: 10
ken883/1200 is an unknown quantity at this point
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Just notice something that has me confused:

Rubbermount_EVO trans slips in 2nd gear 1989 883

Is this a typo or was it posted in the wrong section?

Rubbermount and 1989 seem to be a contradiction to me. Can't be both and some of my replies would not work for a rubbermount which would have a five speed where the 1989 would be a four speed.

But determining if it was a clutch slipping would be the same for any version. If the false neutral only happens in second gear and not the higher gears then It would be transmission not clutch.
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  #15  
Old 3rd September 2019
iNSaNeSHaNe's Avatar
iNSaNeSHaNe iNSaNeSHaNe is offline
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YES 89 is solid mounted to frame.. and a 4 speed ...

If not for personal experience with the torque curve making the clutch slip only at high rpm I would jump on the wagon and say just pull the trans... ( a week spring won't slip at lower rpm. due to lacking torque..883 in 89 won't pull until above 3000 and stops about 5000 check the dyno charts I could be mistaken.. )
. I'm saying to spend $5. and change fluid first.. Then if not noticing a change then spend the time and pull it.

To Check for slipping Just start it and pull in the clutch, then pop it in 4th gear.
Next you rev it up to about 3500 -5000 RPM and see if it will turn loose when you drop the clutch or stall the engine .. if it doesn't stall the engine the clutch is toast..
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  #16  
Old 3rd September 2019
ken883/1200 ken883/1200 is offline
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Join Date: Jun 2019
Location: Fingerlake Area
Posts: 51
Sportster/Buell Model: 883/1200
Sportster/Buell Year: 1992
Sportster/Buell Model #2: Sportster 883/1200
Sportster/Buell Year #2: 1988
Other Motorcycle Model: Yamaha XS 650
Other Motorcycle Year: 1982
Reputation: 10
ken883/1200 is an unknown quantity at this point
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Would be nice if the OP would stop back and let us know if this "false neutral" happens in third or fourth gear. If it is the clutch it would slip even easier in the higher gears.

Testing by trying to stall in fourth gear is also a good test but a bit rough on the clutch.

Not sure of others opinion but in my 1992 five speed I'm running ATF Dexron/Mercon oil since installing the Barnett “Extra Plate” about a year ago.
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  #17  
Old 5th September 2019
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sglock45 sglock45 is offline
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Sportster/Buell Model: 883
Sportster/Buell Year: 1989
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sglock45 is an unknown quantity at this point
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ok yes it is an 89 and a 4 speed I'm on my phone so I must have put the question in the wrong place sorry......any way it only does this slip/false neutral in 2nd gear all other gears work as the should......now that being said I drained the 75w90 gear oil out and put 1 quart of this oil in it and it seems to not do the false neutral thing as much now I'm just wondering if I should flush the primary a couple more times to un gum every thing I've been un xxxxing a bunch of stuff on this bike since I got it prev owner was a farmer and just the wiring alone has made me RIP my hair out thanks for all the suggestions and what exact atf should I use if this oil is no good?????

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  #18  
Old 9th September 2019
iNSaNeSHaNe's Avatar
iNSaNeSHaNe iNSaNeSHaNe is offline
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I would just get some Dex VI if you were planning on leaving it in .. but as for just flushing it a few times I would probably use Type-F as it has more detergent and friction modifiers that work great for the clutch material.and as far as amount I would dump in a full quart or more if trying to get the gunk off the clutch surface. In this case more is better to clean the friction material
You may end up putting in new frictions.
Good luck with it
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  #19  
Old 15th September 2019
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sglock45 sglock45 is offline
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Sportster/Buell Model: 883
Sportster/Buell Year: 1989
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bike is now for sale still has said issue make offers

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  #20  
Old 15th September 2019
ken883/1200 ken883/1200 is offline
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Join Date: Jun 2019
Location: Fingerlake Area
Posts: 51
Sportster/Buell Model: 883/1200
Sportster/Buell Year: 1992
Sportster/Buell Model #2: Sportster 883/1200
Sportster/Buell Year #2: 1988
Other Motorcycle Model: Yamaha XS 650
Other Motorcycle Year: 1982
Reputation: 10
ken883/1200 is an unknown quantity at this point
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Quote:
Originally Posted by sglock45 View Post
bike is now for sale still has said issue make offers

Sent from my SM-G955U using Tapatalk
If someone would be interested in buying a Sportster with a known problem it might be nice to at least give a hint as to where it was located!
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