Author Topic: RD200 Crankcase Tool  (Read 11212 times)

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Offline mech73

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RD200 Crankcase Tool
« on: September 18, 2010, 07:44:59 AM »
Lots of years ago my brother and I had to strip his RD125 when an oil pipe broke and wrecked the crank. Most things were fairly straight forward, apart from rejoining the crank cases. The big o ring seals at the centre made this near impossible and not wanting to resort to violence, we took it to the local Yamaha dealer for this job.



30 years on I had the same job to do on my RD200, this time I decided to make the tools to do the job, which was then quite easy. Here are few pictures and sketches in case it"s of use to anyone else.



Unfortunatly I can"t remember what the exact thread is on the end of the crank on the drive pinion side. I know its M12 fine but I"m not sure whether it is 1mm or 1.25mm.



If anyone does know please tell me and I"ll update the sketch.



Cheers



Mark C











This bit is for driving the crank out





This bit is for re-assembly. (different puller rod for each side)

























1973 RD200
Basingstoke Hampshire

Offline Ohno

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RD200 Crankcase Tool
« Reply #1 on: September 18, 2010, 08:11:51 AM »
How much to make me a set?

Offline mech73

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RD200 Crankcase Tool
« Reply #2 on: September 18, 2010, 09:35:06 AM »
I can"t really go into production as it was mainly built from bit"s and pieces I already had. For welding and some machining, I had to use mates. Screwed rod was from B&Q. M7 threaded bit was an old cylinder stud. PM sent.
1973 RD200
Basingstoke Hampshire

revalot

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RD200 Crankcase Tool
« Reply #3 on: September 21, 2010, 11:35:21 AM »
That is great! Do you know the part number for the Yamaha tool?



even with the tools was it hard to do?

Offline Ohno

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« Reply #4 on: September 21, 2010, 12:41:28 PM »
 
Quote from: revalot
That is great! Do you know the part number for the Yamaha tool?



even with the tools was it hard to do?




Why was it hard? I have it to do over the next few days.

Offline Welsh_Dragon

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RD200 Crankcase Tool
« Reply #5 on: September 21, 2010, 01:52:56 PM »
Sure someone on here could make a set or 2 up
Its all down hill from here!

Offline Sfbrain

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RD200 Crankcase Tool
« Reply #6 on: September 21, 2010, 02:55:36 PM »
This might be a good time to make a suggestion to the clubs admin team.



Why not buy and collect specialist tools for our RDs centrally ??



The club could invest in them, they could be "loaned" by fully paid up members only, secured on a refundable deposit (paypal ??).



It would be a great service, provided by the club to full members only. The club would be trying to ensure the correct rebuilding of our beloved RD"s and would be another benefit for paid up members ??



What do you think guys ??



Just an idea, not trying to spend the clubs money      



Steve
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Offline 8portman

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RD200 Crankcase Tool
« Reply #7 on: September 21, 2010, 03:00:59 PM »
 
Quote from: sfbrain
This might be a good time to make a suggestion to the clubs admin team.



Why not buy and collect specialist tools for our RDs centrally ??



The club could invest in them, they could be "loaned" by fully paid up members only, secured on a refundable deposit (paypal ??).



It would be a great service, provided by the club to full members only. The club would be trying to ensure the correct rebuilding of our beloved RD"s and would be another benefit for paid up members ??



What do you think guys ??



Just an idea, not trying to spend the clubs money      



Steve






I think its a great idea.
74 Fizzy, 78 Mini Clubman, 81 Rd125

Offline [Arrow]

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RD200 Crankcase Tool
« Reply #8 on: September 21, 2010, 03:03:58 PM »
Me too.  

Offline SupeRDel

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RD200 Crankcase Tool
« Reply #9 on: September 21, 2010, 03:19:04 PM »
A very sensible idea and a good waservice to benifit members
 --  Articles always needed

Offline mervin

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RD200 Crankcase Tool
« Reply #10 on: September 21, 2010, 03:46:14 PM »
yup seems good to me

merv
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Offline Donald Follensbee

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RD200 Crankcase Tool
« Reply #11 on: October 03, 2010, 12:13:36 PM »
Nice work.  Recently I had to split a couple of crankshafts.  RD200B and RD200DX.  No tools.  Looked in an old Yamaha service manual for direction and built a set.  Used some heavy bar stock.  Tacked together and roughed out with a hole saw.  Finished on my small lathe. Works well.  Also a pic showing the armature ends, crank centers of a RD200 and a RD200DX and the difference.  Someone on the forum was once wondering about the difference.  Also our (USA) CS3,5, not shown, used a different taper for the generator armature.  Here it is.  Don









































Don

Offline [Arrow]

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RD200 Crankcase Tool
« Reply #12 on: October 03, 2010, 01:50:14 PM »
Nice to see you put up a "regular" post Don.  

Offline 8portman

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RD200 Crankcase Tool
« Reply #13 on: October 04, 2010, 04:27:57 PM »
Thanks for the pic of the armature ends.Just what I wanted.
74 Fizzy, 78 Mini Clubman, 81 Rd125

Offline RogerDodger

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Re: RD200 Crankcase Tool
« Reply #14 on: January 24, 2023, 08:56:41 PM »
I was having a trawl through the site to get some info on the replacement of crank seals when I found this from 2010. Has anyone had experience of using the various brands of splitter/puller to split the case? Given that this looks pretty tricky who would member recommend for crank removal and reinstallation (UK)? Rog