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315 Splitting Engine


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#1 skippy1234

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Posted 29 April 2012 - 10:46 AM

hi all,was wondering if there are any hicups in splitting a 315 engine to replace mains,have done a beta rev 3 with no probs as everything internal stays on the left hand casing ,does the 315 split the same ,also i am looking for an exploded view of the engine its a 98 -315 cota honda engine,also parts list with the bearing numbers ,thanks


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#2 naichuff

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Posted 29 April 2012 - 07:18 PM

The montesa manual sayes that every thing is in the R/H casebut you have to use a crankcase puller and soft hammer The parts book only has Honda numbers Both mains are the same bearings

#3 skippy1234

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Posted 01 May 2012 - 07:02 AM

any more info please as could ,do with starting this weekend,thanks

#4 sherco29

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Posted 01 May 2012 - 07:09 AM

Parts diagrams here... http://montesacota315.com/en/

#5 caravan_monster

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Posted 18 May 2012 - 10:33 PM

I'm preparing to replace the mains in my 315 also. Could anyone advise on the following:

Special Tools - Looks like I need to buy

- a M30 flywheel puller
-some sort of clutch or flywheel holder
-crankcase puller
-crankcase assembly tool

I can have use of a press and bearing puller. Have I missed anything ? Can I do without any of these items ? Presumably ebay will be ok to source them, but are there any particular models of any of these tools that are best for price / ease of use ?

Gaskets - Is it possible to buy a decent quality complete gasket set cheaper, instead of buying them all seperately from Sandifords ?

Neutral Gear - it's virtually impossible to select neutral with the engine running. Is this down to wear ? Is there anything I can do about this whilst the engine is on the bench, or is it just a characteristic that I'll have to live with ?


(I understand recommending suppliers is not allowed on this board, but please do PM me if you know of anywhere that can help with the above tools and / or parts)

#6 nelly1

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Posted 19 May 2012 - 12:57 PM

the flywheel has an external thread good luck finding a puller mate
i got 5 on it

#7 andy

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Posted 19 May 2012 - 01:23 PM

Recommending suppliers is fine as long as the poster does not gain personally
Nutter magnet

#8 caravan_monster

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Posted 19 June 2012 - 07:53 PM

Got the job done. Special tools needed are crankcase puller and flywheel puller - I was incorrrect above - the flywheel puller is 32mm x 1.5mm pitch l/h thread. It's an unusual size: this firm can make custom pullers. I don't think there is much advantage to buying the main bearings from an engineering shop - the expensive parts are the seals.




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