Author Topic: Skipping or spinning... (Read 7520 times)

anutz · « **on:** 24 August 2016, 06:45:06 pm »

Hi All,

So i usually frequent the FZS600 section, i have a 2001 box eye....just got a 2003 FZS1000

Over the moon with it but have noticed something i cannot quite figure out...

When i accelerate, in my mind hard, then sometimes it almost feels like the chain jumps a tooth, or the rear wheel skips, i cannot figure it out, i am going to double check the chain slack later, and the rear tyre is a little worn so may need replacing, aside it rides really nice.

It is worth noting its the first 1000cc i have ridden, i do own and ride a GSXR 750, and have not noticed this problem, so maybe its more likely chain and not wheel starting to spin up....

Thanks

Anutz!

Fazerider · « **Reply #1 on:** 24 August 2016, 08:39:20 pm »

Other possibilities to consider: slop in the suspension such as worn bushes in the linkage or swingarm pivot... or a knackered shock, or the cush drive or a dying wheel /cush bearing.

anutz · « **Reply #2 on:** 24 August 2016, 09:41:31 pm »

Quote from: Fazerider on 24 August 2016, 08:39:20 pm

Other possibilities to consider: slop in the suspension such as worn bushes in the linkage or swingarm pivot... or a knackered shock, or the cush drive or a dying wheel /cush bearing.

So just checked the front sprocket and its ok...not sure if the chain slack is too much, just got in and i am sure i can head some slight slapping, but again only under hard acceleration do i see this...

how can i test for the above i.e. bushes/bearings, pulling and looking for movement on wheels, swingarms etc?

It rides well just not sure about this skipping/slipping...

anutz · « **Reply #3 on:** 24 August 2016, 10:25:37 pm »

Quote from: Fazerider on 24 August 2016, 08:39:20 pm

Other possibilities to consider: slop in the suspension such as worn bushes in the linkage or swingarm pivot... or a knackered shock, or the cush drive or a dying wheel /cush bearing.

Have had a good tug around the suspension linkages, and the swingarm, little bit of play in that, but nothing more than what is in my FZS600, or my GSXR750, its play but not around linkages, more as a whole unit....it was the same when it was MOT'd

I will keep an eye, i think the rear tyre is low, so that combined with this happening only as i really wind it on, makes me wonder, will also get a photo of the sprocket so can see what others think, my judgement says its ok but i am no expert...

old son · « **Reply #4 on:** 25 August 2016, 06:46:20 am »

I have a similar sensation when I use the back brake hard to slow down. Feels like the chain has jumped, sort of clanking noise. I suppose it could be chain hitting the rubber guide?

Timbo · « **Reply #5 on:** 25 August 2016, 02:20:00 pm »

Skipping?

Is your pre-load wound up too hard? The bike needs to be able to squat a little under acceleration to allow the tyre to work.

Bw

The Male Whale · « **Reply #6 on:** 25 August 2016, 02:34:52 pm »

Post up a pic of the front sprocket?

I would say that is odds on!

Whale

anutz · « **Reply #7 on:** 25 August 2016, 04:09:46 pm »

Quote from: Timbo on 25 August 2016, 02:20:00 pm

Skipping?

Is your pre-load wound up too hard? The bike needs to be able to squat a little under acceleration to allow the tyre to work.

Bw

Pre-load is on 6 i think....will get a photo of the sprocket up tonight after work.

Dustydes · « **Reply #8 on:** 25 August 2016, 04:30:04 pm »

Quote from: Timbo on 25 August 2016, 02:20:00 pm

Skipping?

Is your pre-load wound up too hard? The bike needs to be able to squat a little under acceleration to allow the tyre to work.

Bw

Lots of info on set up

Here is one

http://www.gostar-racing.com/club/motorcycle_suspension_set-up.htm

anutz · « **Reply #9 on:** 25 August 2016, 06:02:58 pm »

Front

Rear

Timbo · « **Reply #10 on:** 25 August 2016, 06:09:52 pm »

Starting to look hooked I'd say.

Sent from my GT-S7275R using Tapatalk

Nigel1000 · « **Reply #11 on:** 25 August 2016, 06:39:32 pm »

Is this happening in all gears or just one gear?

Could be gear selector issues, normally 2nd gear caused by ham fisted wheelies.

Dustydes · « **Reply #12 on:** 25 August 2016, 07:14:00 pm »

Quote from: anutz on 25 August 2016, 06:02:58 pm

Front

Rear

On it's way, but not enough to skip, at least not if adjusted correctly

anutz · « **Reply #13 on:** 25 August 2016, 07:25:55 pm »

i am going to adjust the chain, i think its a tad loose, i might have heard it rattling a little last night when i slowed down - will try that first, just servicing exup right now.

anutz · « **Reply #14 on:** 27 August 2016, 04:55:29 pm »

So as suggested by Fazerider...

I have had a good tug at the frame, wheels etc, there is play in the rear wheel, not around the whole circumference, but definite clunking when i try to twist it with hands at top and bottom...

do you think bearing replacment is something i can DIY, or is it best left to someone who has done it before?

unfazed · « **Reply #15 on:** 27 August 2016, 05:37:02 pm »

The best way to check for bearing play in the wheel is to remove the caliper. The caliper will and pads will reduce the level of play because of their grip on the disk.

Rattling on slow down could be the EXUP valve is it is not adjusted properly

anutz · « **Reply #16 on:** 27 August 2016, 06:03:27 pm »

So i have the rear caliper off, i just put the wheel in with the hanger etc, and then torqued it all up with the chain adjusted, and rotated it around trying at points to twist it...

When i rotate the rear wheel i can hear and feel different sounds/patterns, as opposed to a smooth running of the chain over the sprockets, and my FZS600 or GSXR750 have no such play when i try to twist their rear wheel...

anutz · « **Reply #17 on:** 27 August 2016, 06:05:35 pm »

at the risk of looking like an idiot, have a video of what i think it play, will stick it up asap....

Anutz

anutz · « **Reply #18 on:** 27 August 2016, 06:26:11 pm »

So this may be normal, i have no idea

sadlonelygit · « **Reply #19 on:** 27 August 2016, 07:10:50 pm »

That front sprocket is scrap and the rear doesn't look too good.

anutz · « **Reply #20 on:** 27 August 2016, 07:27:29 pm »

i will be changing the lot anyway now i have the other issues, may as well give it a good doing over

did u look at the video, is that just normal or not?

Fazerider · « **Reply #21 on:** 27 August 2016, 07:50:02 pm »

That bearing is definitely knackered!

Fazerjon · « **Reply #22 on:** 27 August 2016, 08:49:57 pm »

You beat me to it, that bearing is totally f***ed!!

anutz · « **Reply #23 on:** 27 August 2016, 09:04:38 pm »

So i suspect i will be doing the following

New Front/Rear sprocket/chain
New Rear Bearings

The chain and sprockets i can change myself i have done that before

have never messed with drifting bearings out and seating new ones, is this best left to the local mechanics?

don't want to nacker the wheel

robbo · « **Reply #24 on:** 27 August 2016, 09:54:05 pm »

If you are confident doing the chain/sprockets, then you'll be fine replacing the bearings. Plenty on here will offer any advice that you'd need.