I have recently bought my first classic twin shock trials. I believe its a montesa 349. Frame and engine numbers both start with 51M. Im wondering if anyone could help me identifying what year it is?

349's with the 51M code were manufactured between 1979 and 1983. Can't tell what you have with so little information. Go to www.montesaweb.com and match your 349 with the correct year.

Any ìcture of that machine??

I've a 349 too.

Thanks for the help. I do have pictures of it, however its all in parts!

What color is the tank? Is the tank fiberglass or plastic? What color is the frame?

Here's what my late 1982 / early 1983 looks like (plastic tank):

Beauty....................I've a 81 Ulf Karlson replica..............white.

Does anyone have pitcures of ther REAL ULF Karlson 349...............I mean the works bike.

My project is to make a real replica.

I've just begin to "put things in place".

First thing is the bar.................I'll put a Renthal 5.5

Second thing probably, rear shocks................any advice??? NJB or Magicals??

this is a 80 model

This is mine--------1981 model

Heres a picture of my 349 i bought it of john reynolds its a 1981 and is pictured with john riding it in the scottish i also believe that rathmell had an identical bike.

just found your post hope this helps.

That's a great pic of a lovely bike.

I have tried to make a replica myself.

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Will probably put the original silencer back on as it's not quiet running right yet.

That's a great pic of a lovely bike.

I have tried to make a replica myself.

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Will probably put the original silencer back on as it's not quiet running right yet.

It wont do with that WES on it. I tried one, and it went straight on ebay, choked the motor and it wouldn't rev!

Interestingly I had that exact problem, took it out today with both silencers, much better with the standard one, hmmmm, may take it apart and see what's inside.

Hi there,

The late model 349 and MH349 definitely run better with the heavy standard rear box. I have a virtually unused WES back box somewhere in the loft.

The standard rear box has a baffled first chamber and an absorption second chamber. The first chamber can be heavily blocked with carbon and oily gunge. With care the standard rear box can be cleaned and repacked without having to reweld it.