Hello everyone and thanks for the add. I recently acquired a Montesa 349 white wonder circa 1981.  My first Montesa restoration..  I am quite alarmed at the lack of good workshop manuals in English and in depth.   Just a few asks - what ratio of fuel to oil and should I use and which oil - synthetic/semi synthetic/mineral oil ?(for my other bike I use rock oil pp2) Also what other oils should I be using for other internals.  Thank you.

Hi Dave, recently sold my 348 MRR. There aren’t many if any good workshop manuals about but plenty of info available on this site. Most 348 (305cc) and the 349 (actual size) would be run on 50:1 fully or semi synthetic. Main thing to remember is that on long downhill sections and when slowing down from highish speeds don't close fully the throttle or you may seize the piston/ring. I gave all my info away with the sale so sorry otherwise you could have had the file. You can download a Montesa owners manual if only I could remember the blessed address.?‍♂️Type in Montesa Cota Manual that will get you started.?

Thank you , I did download the manuals but not a lot of info in them.

What about the other oils? Any info would be great

Edited November 23, 20205 yr by DaveR

For a 348 its 300 mils (SAE 10W30) in the clutch and 300 mils (SAE 90) in the gearbox so a 349 should be similiar I would think..

Morris golden film works well in the clutch.

Hope that helps

 

So the gearbox oil is added in the central filler plug just below the carb and the clutch oil is added to the filler plug on left of bike near clutch lever bracket ?

38 minutes ago, DaveR said:

So the gearbox oil is added in the central filler plug just below the carb and the clutch oil is added to the filler plug on left of bike near clutch lever bracket ?

Yes it is.

And don't forget to take care with the positioning of the kickstart lever, if I remember rightly a 1oclock position, at rest, will save your crankcase from being internally holed. Once done you'll not make the same mistake again, no matter how practical it may seem !

 

 

Edited November 24, 20205 yr by rotors7

Thank you .  The lack of any sort of decent quality manual is the reason I am asking these stupid questions.  Thanks again.

You can of course use Auto-trans fluid in the clutch as this is produced to work in all metal and high heat clutch packs. Less tendency for sticking too!  

Recommended oils for the 349 are as follows:

Gearbox - 300 cc -, SAE 90 

Clutch - 300 cc - 10W-30 (I use Maxima MTL-XL 75W transmission oil for the clutches in both my modern and vintage bikes)

Front forks - 210 cc per leg, 10W fork oil (any decent brand)

Gas / oil - Montesa manuals recommended a 4% mixture, but with todays synthetic oils 50:1 is fine. I use Amsoil Interceptor at 60:1, again in both my modern and vintage bikes

I'm just on the final leg of a 248 restoration.

Will be using 90GL5 in the gearbox, Auto transmission in the clutch, have already put Plutoline SAE10 in the forks.

 

Clutch breather mod. Tube routed up into main frame top tube. Gearbox breather is routed into the air filfer box, ign case breather is routed up the front downtube and exits under the tank in the space behind the steering tube/frame bracing. Have used clear tubing so I can see what is going on at any time.

 

 

I managed to get hold of a clymer manual, its not great but better than nothing ?

Please tell me if I'm a duckhead or missing something here, but why couldn't you put the same oil in the clutch and gearbox like we put in our modern bikes that serves both, something like Putoline GP 10 or Motul Transoil as an example. Just asking because I'm both confused and curious. Cheers.

2 hours ago, fourex said:

Please tell me if I'm a duckhead or missing something here, but why couldn't you put the same oil in the clutch and gearbox like we put in our modern bikes that serves both, something like Putoline GP 10 or Motul Transoil as an example. Just asking because I'm both confused and curious. Cheers.

No reason at all Rod. That's what I do with most of my bikes that have the two compartments separated

Edited November 30, 20205 yr by feetupfun