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Post by billbott on Jan 15, 2024 23:27:34 GMT 1
My 350 has always been a bit noisy on the clutch side. Partially due to the sloppy kickstart idler bush but also the clutch basket primary gear bush was worn out. The original is a split glacier type bush but with a perforated bronze inner. Tried sourcing one but the nearest is the correct O/D but the bore is 1mm smaller. Decided to make my own from PB1 bronze. First attempt was a little tight so I polished it in situ, so when I made a second (to go in my 250) I gave it another 0.02 clearance and it’s perfect. Heated up the primary gear with my heat gun and left the bushes in the freezer overnight. Made a little dolly and they tapped in lovely. Kickstart idler gear is far simpler, an off the shelf bush is available so I’ve ordered some, with a bit of luck they’ll be here be weekend so I can put it back together. You can see the fretting on the original bush. I saw that someone was making these but there’s some satisfaction in fixing it yourself. Just need to wait for my birthday now for a new basket as the fingers on mine are somewhat groovy…..   |
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Post by steeley on Jan 16, 2024 15:07:18 GMT 1
Nicely done . As you say its satisfying when you make the parts yourself .
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Post by Tobyjugs on Jan 16, 2024 15:24:42 GMT 1
Hi Bill if you don't mind spilling the beans what was the final clearance between shaft and bush?
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Post by billbott on Jan 16, 2024 15:45:28 GMT 1
Hi Bill if you don't mind spilling the beans what was the final clearance between shaft and bush? I used the old school theory of 0.001” / inch on diameter which roughly equated to +0.030 / 0.035mm between the sleeve and the bush when fitted. |
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Post by urbantangleweed on Jan 18, 2024 7:51:15 GMT 1
Hi Bill, Would you be OK to share the kickstart idler gear bush reference number? I'm sure many on here would be interested to install a new one.
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Post by billbott on Jan 18, 2024 13:09:07 GMT 1
Hi Bill, Would you be OK to share the kickstart idler gear bush reference number? I'm sure many on here would be interested to install a new one. I havent received them yet so hang fire until I have fitted one just in case! The bush reference is GB1510DX Glacier Bush (15mm ID - 17mm OD - 10mm Wide) I'm hoping they arrive today so will report back  |
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Post by 4l04ever on Jan 18, 2024 17:25:49 GMT 1
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Post by midlifecrisisrd on Jan 18, 2024 17:59:10 GMT 1
But 33 times more expensive 😳
Steve
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Post by jon on Jan 18, 2024 19:30:44 GMT 1
I’m fortunate enough to have bought an OEM style bush a few years back to use on my next basket swap. Rob beat me to it with the MBD one. They do seem expensive, but at least they are available.
Jon
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Post by midlifecrisisrd on Jan 18, 2024 21:08:08 GMT 1
I get the fact we should be grateful but at the end of the day if you know where to look a new gear isn't much more
Steve
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Post by peddrotzr on Jan 18, 2024 21:41:58 GMT 1
I fitted one of these Gear and bush to a motor after the gear shattered fitted a treat and still working fine since 2016  Best regards Johnny C.
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Post by muttsnuts on Jan 18, 2024 22:34:26 GMT 1
I do a custom bush service for the clutches, make a new bush to fit you gear and bearing sleeve, takes out all of the wear
Not too far aay I'll be offering the option to rerplace the bush etc with needle rollers, will involve a new kick starter gear, needle rollers and a new bearing sleeve, not sure on price yet, but that will remove the need to ever worry about it again and reduce the friction quite considerably
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Post by billbott on Jan 19, 2024 13:36:23 GMT 1
Hi Bill, Would you be OK to share the kickstart idler gear bush reference number? I'm sure many on here would be interested to install a new one. I havent received them yet so hang fire until I have fitted one just in case! The bush reference is GB1510DX Glacier Bush (15mm ID - 17mm OD - 10mm Wide) I'm hoping they arrive today so will report back Fitted this morning and it’s perfect 👍 |
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Post by urbantangleweed on Jan 19, 2024 13:37:35 GMT 1
I havent received them yet so hang fire until I have fitted one just in case! The bush reference is GB1510DX Glacier Bush (15mm ID - 17mm OD - 10mm Wide) I'm hoping they arrive today so will report back Fitted this morning and it’s perfect 👍 Excellent, thanks Bill. |
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Post by midlifecrisisrd on Jan 19, 2024 14:47:39 GMT 1
Cheers Bill
Just ordered 5 for less than a tenner delivered
Steve
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Post by urbantangleweed on Jan 19, 2024 18:56:05 GMT 1
Cheers Bill Just ordered 5 for less than a tenner delivered Steve Me too, £8.76 delivered. Did I out-Scottish you? |
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Post by midlifecrisisrd on Jan 19, 2024 19:11:36 GMT 1
Cheers Bill Just ordered 5 for less than a tenner delivered Steve Me too, £8.76 delivered. Did I out-Scottish you? How very dare you 😤 I spent £9.97 😭 Steve |
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Post by urbantangleweed on Jan 19, 2024 19:18:50 GMT 1
Me too, £8.76 delivered. Did I out-Scottish you? How very dare you 😤 I spent £9.97 😭 Steve Yes! 😊 |
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Post by Tobyjugs on Jan 19, 2024 20:32:10 GMT 1
Extra postage costs to get it over the wall
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Post by Tobyjugs on Jan 19, 2024 20:35:57 GMT 1
Personally i still think the bush is a better solution.
I say that but i do have one clutch using roller bearings and one first gear running on roller bearings.
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Post by urbantangleweed on Jan 19, 2024 21:06:44 GMT 1
Extra postage costs to get it over the wall 😃 |
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Post by urbantangleweed on Jan 26, 2024 18:43:11 GMT 1
Well, they arrived, the 4lb lump hammer was found and an idler gear became the home for a lovely new glacier bush.
Before and after in the video link below. Is it better? Not sure..... Maybe a bit?
Will find out when it's running.
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Post by billbott on Jan 26, 2024 19:05:49 GMT 1
Mine was MUCH looser than yours before I replaced it. The term a turd in a p!spot sprung to mind…..
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Post by midlifecrisisrd on Jan 26, 2024 19:19:06 GMT 1
Even new gen Yam gears are wobbly
The idea is that it helps the kick-start gear engage
Steve
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Post by jon on Jan 26, 2024 19:20:30 GMT 1
Well, they arrived, the 4lb lump hammer was found and an idler gear became the home for a lovely new glacier bush. Before and after in the video link below. Is it better? Not sure..... Maybe a bit? Will find out when it's running. I replaced one too no wasn’t overly impressed with the improvement. I will be turning a custom bush from phosphor bronze next time. Jon |
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Post by JonW on Jan 26, 2024 23:37:08 GMT 1
I remember when TSS (and others) sold a version of these and people complained they were loose back then. Yam could have got them 100% right and didnt, makes you wonder if that was by design as has been said.
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Post by midlifecrisisrd on Jan 27, 2024 0:02:36 GMT 1
It's a wizards sleeve for a reason
If not operating the kick-start would be a hit and miss just like trying to go up and down the gearbox with the engine running but the bike not moving (input shaft turning but output shaft not turning)
Steve
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Post by billbott on Jan 27, 2024 10:54:59 GMT 1
The one on my 350 got really noisy. When I stripped it down, it had been rattling around and clashing with the peined over rivets on the back of the primary gear.
So the new bush was a massive improvement on mine 😊
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