Have a 348 montesa 1977 was wondering what bike should be gapped and timed,also bike has a delorto carb on it a phbh26 cs r4173.was wondering if anybody might know or have any recommendtions on how to jet this carb or what it could of come with stock and was it ever used on these bikes

thanks

Rockhopper

You have good taste in bikes.

348 Cota timing is 1.8mm BTDC or 17.5 degrees BTDC

Ignition points gap 0.4 mm

Sparkplug gap 0.5 to 0.6 mm

Sparkplug NGK BP5ES or Champion N12Y

Cota 348 comes standard with MKII AMAL concentric (square body round slide AMAL same as what came on Bultacos of the same era) AMAL model 2626/402

Some people fitted a Dell Orto carby to replace the AMAL on the 348. My 348 goes great with the standard AMAL carby with standard jetting. AMALs tend to wear out needle jets and needles quite quickly but parts are usually readily available. New AMAL and MIKUNI carbies are available for the 348.

David Lahey

Australia