CЯM125 1991 RU =)

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CЯM125 1991 RU =) Empty CЯM125 1991 RU =)

Message  Invité le Dim 9 Aoû - 21:29

Hi All, let me post a duplicate from my presentation:

Here's my CRM 125 1991 imported from Finland as separate parts a couple years ago and this is my first full-size enduro. I ride pure off road and as hard as I can. I know that CRM is not the best choice for that, but I didn't really have other options for my budget. I’m not the first owner of this bike in Russia. I bought it from a guy from Saint-Pete. This is how I saw it first time at delivery office (previous owner also used it for enduro):
CЯM125 1991 RU =) 9471785_m

My thought was “neat, it has arrow silencer!” Smile
It was old fully de-restricted enduro bike with completely rebuilt engine in a bad shape cosmetically. So many things we went thru…
CЯM125 1991 RU =) 8881042_m
- Installed studs inside old tires for winter rides https://youtu.be/k5z8KXZmjxk
- Re-assembled and sealed wire harness
- Removed oil tank, installed alloy throttle grip with bearing and replaced Y-type wire cable with simple I-type
- Replaced footrests with larger mx-type rests with better grip (musthave for enduro!)
- Removed speedo wire cable and gearing, passenger footrests, toolbox. Turn and stop signal were already removed
- Installed reinforced brake hoses
- Replaced clutch wire cable with one from Chinese bike (plug-and-play, works perfect)
- Improved custom-made radiator guard, installed 2x 120mm fans
- Replaced rear wheel bearings and seals, gear selector seal, fork seals, 2x linkage needle bearings and seals, head gasket, engine oil, coolant, …
- Replaced front fender with Yamaha YZ
- Installed 35W LED bulb
- Installed alloy gear shifter pedal
- Installed pipe guard, hour meter and fuel filter
- Some plastic fixing, de-painting and sticker application job Smile
- Lots of other stuff which I can’t recall Smile

Recently I had 4-week maintenance including 2-week awaiting for a gasket kit, but now it’s all done and I spend my weekends in woods, fields, hills and sands!


Dernière édition par RU_r0k1e le Ven 14 Aoû - 16:42, édité 1 fois

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CЯM125 1991 RU =) Empty 50T rear sprocket

Message  Invité le Dim 9 Aoû - 21:36

CRM gearing is long for enduro. It can be convenient on road/trails as you can shift less frequently and also have nice top speed. If your riding style is more about sands, hills and mud you should find lower gearing much more useful. You can gain more torque by sacrificing top speed. Your bike will be much funnier to ride and you eventually will find yourself be able to ride places which were previously impossible to reach. Top speed should not be a concern as anything higher than 90-100 kmph are useless and simply too dangerous for a bike with MX-type tires.

It’s easy to switch from original 14x40 to as low as 12x44 cause such sprockets are available from aftermarket parts. JT part numbers are JTF327.12 (http://www.jtsprockets.com/catalogue/sprocket/JTF327-12) for the front and JTR 604.44 rear (http://www.jtsprockets.com/catalogue/sprocket/JTR604).
It’s already makes huge difference comparing to original – ~28% increase for gear ratio. However, if you want more then you’ll hit the wall since it’s nearly impossible to find something <12T front and >44T rear for CRM. Actually per PBR website (http://www.pbr.it/index.php?option=com_content&view=article&id=8557:honda-125-crm-r&catid=39:corone-e-pignoni&Itemid=99&lang=en) they had front from 10 to 15 and rear 34 to 45 but in practice 45T could not be found anymore in the web.

Luckily a friend of mine, when I told him the story suggested to make an adapter. He had 50T D-Tracker sprocket (JTR460.50) and did some machining which resulted in this:

CЯM125 1991 RU =) 9526920_m

CЯM125 1991 RU =) 9526921_m

Some painting...
CЯM125 1991 RU =) 9526922_m

Mounting...
CЯM125 1991 RU =) 9526924_m

And real-life test!
CЯM125 1991 RU =) 9526925_m

The adapter could be better cause it’s quite heavy but I guess it doesn’t affect much. Probably some metal will be removed later. Anyway, it did the job and now I’m so happy with 40T->50T switch. I thought that 50T could be a little bit too much, but it works perfect – I don’t want to use anything lower 12x50 for sure Smile

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Message  crm29 le Dim 9 Aoû - 22:21

nice job!

what type of lathe use your friend?

I'have one too....a mid size......near 650kg.....

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Finou06320 a écrit:Tutos dans vos tutoriels et crm29 si tu le trouves pas il te trouvera lol


crm33 a écrit:Bon crm29 à encore raison


sly42 a écrit:
avec crm 29 c'est court clair net et precis !!!!  Very Happy  Very Happy




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Message  Invité le Lun 10 Aoû - 12:15

Thanks! It's not big and I guess soviet-made. The adapter diameter is almost maximum that lathe can hold.

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Message  crm29 le Lun 10 Aoû - 15:30

can you post a picture of the lathe?

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Finou06320 a écrit:Tutos dans vos tutoriels et crm29 si tu le trouves pas il te trouvera lol


crm33 a écrit:Bon crm29 à encore raison


sly42 a écrit:
avec crm 29 c'est court clair net et precis !!!!  Very Happy  Very Happy




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Message  Invité le Ven 14 Aoû - 16:33

I will! Wink

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