Report Slide Gap On Amal Carb in Montesa Posted August 9, 2012 · Edited August 9, 2012 by petenz Yes..You still have to get air into the motor even at idle.. just had a look at the Amal on my 348.. theres easy 4 or 5mm gap on the air cleaner side...
Report 1976 Montesa 348 Cota in Montesa Posted July 21, 2012 · Edited July 21, 2012 by petenz bottomed out ?.. Do you mean stuck down ? just had the same prob with my 77 cota 348... mine had a craked piston on the top of one of the damping rods so I made 2 new ones in acetal.. thinking that was the issue but after reassembleing they still stuck down.... I found in the end it was the plastic/nylon sleeves at the bottom of the damping rods jamming in the stantion when fully compressed.. the fix was to machine the OD down till the fitted in the stantion with out jaming in there.. wonder if the nyon sleeve has swalled up over time.. Another prob I found is the stantion would stick just slightly in the slider for the last 3mm of travel..
Report Montesa Clothing in Trials Gear Posted July 10, 2012 http://www.scb-retro.com/products/montesa-sweat-shirt
Report 348 Stuck Fork Leg in Montesa Posted July 9, 2012 Found the prob.. Alloy piston on the top of the damping rod has cracked in two..was cleaning it up and fell on the floor in two... So I will turn up 2 new ones in Acetal "nylon" theres no load on them spring pressure is on the damping rod..
Report Cota 348 Airbox in Montesa Posted July 9, 2012 Hi, Ive got 2 349´s one is missing the airbox and I´ve fitted a universal foam thing. If you want to get one a chap in Germany has reproduction ones www.montesa.de (there a bit expensive for liking). what I'm going to do.. get a block of PVC foam , shape it to fit in the frame air box shape then fiber glass it leaveing the top open... the dig the form out leaving a fiber glass air box. bit of filler , sanding , black paint & it will look like it was ment to be there..
Report 348 Stuck Fork Leg in Montesa Posted July 5, 2012 · Edited July 6, 2012 by petenz could you clamp an old yoke to it and use that to hammer it out or try and turn it with wd40 in there What I will try.. Is clamp the stanction in the lathe chuck to hold it , put the axle bolt though the slider axle hole see if I can rotate it while pulling.. hammering it will be the last option.. Edit.... I got it... twist pull it came out .. couldn't see anything wrong.. now it slides like it never had a prob..damping rod pushed out easy.. I have no idea what the prob was... No dents or bends... just struck another issue while pulling it apart..can't get the swing arm pivit bolt out.. must be rusted in...Get the motor out and cut though the bolt & bushs each side... then turn up some new bushs/internal sleeve & bolt...
Report Front Brake in Beta Posted July 5, 2012 · Edited July 5, 2012 by petenz reduce the surface area of the pads... cut some away.. cut them so the length is less.. retain the hight so you don't ware groove on the disc...
Report 348 Stuck Fork Leg in Montesa Posted July 5, 2012 I mean rust inside the tubes where the piston contacts the tube Ok..not looked to hard in there.. if the bottom bolt holding the damping rods removed wouldn't the stachon/damping rod/piston all slide out as a unit if theres rust stoping the piston moveing inside the stanchon ?
Report 348 Stuck Fork Leg in Montesa Posted July 5, 2012 Pete is it rusty in there? I had problems with getting some 348 forks apart when there was rust blisters on the inside surface of the tube from what tube is out of the slider theres is no visable rust other than very small pits under where the plastic sleeves were between the triple clamps.. the other leg shows no sign of rust...
Report 348 Stuck Fork Leg in Montesa Posted July 5, 2012 · Edited July 5, 2012 by petenz just started the build on my 348 ,, the right fork leg is stuck 3/4 of the way though it's travel... " locked solid" spring out bottom bolt out theres no way this thing will move.. A bent main is a possability but the top section looks stright so if there is a bend it's down in the botton slider... Any other ideas what could be the prob if its not a bent main tube & how to get it apart ?
Report Striped Bolts On Crankcase! in Sherco Posted July 1, 2012 · Edited July 1, 2012 by petenz 3 quick easy options... first see if you can use a longer bolt... there may still be good thread passed the striped thread... assumeing its a 6mm thread.. you can retap the hole for 1/4" bolt... 1/4" is .4mm bigger than 6mm.. use UNC 1/4" thread.. If the holes not to butchered it will work... done it a few times over the years.. see if you can loc-tight small studs in. Maybe combine options 2 & 3...
Report 247 / 348 Clutch in Montesa Posted July 1, 2012 Can anyone tell me if the 247 & 348 share the same clutch. I know it's a long shot..but hopeing... I'm after a 348 clutch drum . can't find one , but the 247 clutch parts are everywhere..
Report Suspention Set Up.. in Twinshock Posted June 26, 2012 Hello... I have just bought a cota 348... first trials bike in 20 plus years.. How is the suspention on a trials bike set up ? Sag height %.. unloaded & loaded "with rider weight" The rear shocks are stuffed , So they will be replaced I'm only going to use it in the clubmans class so am looking at a set of Betor shocks , prise is not to over the top.. As I live in NZ I have to take into account exchange rate & shiping cost.. when those are added on cheaps not cheap any more.. Thanks Pete
Report Cota 348 Airbox in Montesa Posted June 24, 2012 Hi.. just bought my first trials bike in over 20 years.. A 77 Cota 348 thats missing its airbox.. can anyone point me in the right direction to where I may locate one.. Thanks Pete..
Report Hello From Nz in Introduce Yourself Posted June 24, 2012 · Edited June 24, 2012 by petenz Hey all... Just bought my first trials bike in 20 plus years. A old 77 Montesa Cota 348, I intend to have a go at a few twinshock trials events.. I done a bit of trials way back when on a KT250 , but was more interested in MX & enduro back then . The bodys got a bit old , I don't bounce like I use to...& I'm to slow now anyway... So getting back into trials is a better option now.. I also have a 09 XT660R Enduro side car unit (will do when I finish building it) & 05 XR250.. The Montesa in ok condiction apart from it's missing the air box.. Pull it apart clean and polish the alloy up. Try and make it look like something..Get it ready for summer.. like i need another project..LOL..... Pete By petenz at 2012-06-22 By petenz at 2012-06-22
Slide Gap On Amal Carb
in Montesa
Posted · Edited by petenz
Yes..You still have to get air into the motor even at idle..
just had a look at the Amal on my 348.. theres easy 4 or 5mm
gap on the air cleaner side...