Transmission backlash - Yamaha Star Stryker Motorcycle Forum
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Old 06-24-2013, 05:44 PM   #1 (permalink)
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Default Transmission backlash

Gooday all,

I'm new to the world for bikes so this question might be all noob no experience.

How much backlash should there be when on and off the throttle?

For example, if I'm cruising in first or second gear and let off the throttle to coast to a slower speed then get back on the throttle the tranny seems to take a sec to catch up to the acceleration and clunks

I've asked a couple fellow riders and have been told there bikes don't do that.

Is it a Stryker thing, a driver thing, or a problem with my bike

Thanks for your replies all

Cheers
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Old 06-24-2013, 05:51 PM   #2 (permalink)
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Adjust the throttle lever to take up the slack in cable. This condition seems to go away after first service and as you get accustomed to bike- you won't even remember it happening anymore.
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Old 06-24-2013, 07:16 PM   #3 (permalink)
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Not sure if it's a Stryker thing or a Yamaha thing. I do notice a bit more backlash on the Stryker than On my previous bike. I also noticed that the Yamaha FJ I used to own had similar characteristics. It is something you get used to. As 11Stryker said double check the throttle cable adjustment (and clutch cable while your there). I'm just guessing but I would think that it has to do with the tooth profile of either the primary gears or the tranny gears.
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Old 06-24-2013, 07:45 PM   #4 (permalink)
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Thanks 11Styker and Wayne,

Throttle cable adjustment makes a lot of sense.

I will make the adjustment and post my conclusion.

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Old 06-24-2013, 09:05 PM   #5 (permalink)
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New all along but was told that exesive trany lash is primarily a drive belt adjustment problem. Although the Stryker does seem to have a bit more than average. For example after getting serviced last week our belts are far tighter than ever before but still the 950 has no lash when comparing it to the Stryker.
Found out this week that loose belt tension is the primary cause of 3 symptoms, exsesive lash, hesitation in throttle response/flat spot and surging. For those of you that are experiencing those symptoms the fix may be as simple as tightening the belt. Seems that a loose belt causes a momentary signal in the load sensor that tells the ECU there is no load causing the flat spot or hesitation in throttle response.
It is important to check your belt tension at 600 mile, first service, and at 2 to 3,000 mile intervals, every oil change. I now will be checking mine more often than that due to the extreme roads I ride.
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Old 06-24-2013, 09:26 PM   #6 (permalink)
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Quote:
Originally Posted by toby View Post
New all along but was told that exesive trany lash is primarily a drive belt adjustment problem. Although the Stryker does seem to have a bit more than average. For example after getting serviced last week our belts are far tighter than ever before but still the 950 has no lash when comparing it to the Stryker.
Found out this week that loose belt tension is the primary cause of 3 symptoms, exsesive lash, hesitation in throttle response/flat spot and surging. For those of you that are experiencing those symptoms the fix may be as simple as tightening the belt. Seems that a loose belt causes a momentary signal in the load sensor that tells the ECU there is no load causing the flat spot or hesitation in throttle response.
It is important to check your belt tension at 600 mile, first service, and at 2 to 3,000 mile intervals, every oil change. I now will be checking mine more often than that due to the extreme roads I ride.
Good call Toby. I didn't even think to mention the final drive as the original poster was talking bout the tranny but your right a loose drive belt would cause exactly those symptoms. to many years dealing with chains and carbs!
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Old 06-24-2013, 09:39 PM   #7 (permalink)
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^^^^and the manual actually calls for a belt check every 2500 miles.
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Old 06-24-2013, 09:44 PM   #8 (permalink)
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Excellent!

Thanks all!

The weather is perfect to get intimate with my wife's new compition

Cheers
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Old 06-24-2013, 10:42 PM   #9 (permalink)
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Quote:
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^^^^and the manual actually calls for a belt check every 2500 miles.
Oh really seems I missed that.
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Old 06-24-2013, 11:18 PM   #10 (permalink)
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Page 7-6 in the owner's manual, page 3-2 of the service manual.
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