berkshireduncan Posted January 31, 2015 Report Share Posted January 31, 2015 So.. I ordered a 'Montesa' rotor puller from Sammy Miller, which is (by my measurement) 30mm. However, my 348 has had a number of upgrades over its life, including a Motoplat Mini 6 Electronic ignition.. which I'll be posting off to Bradford Ignitions as soon as I can get the rotor off.. The crank end makes measurement in-situ with calipers tricky, but I make the internal thread size about 26mm, so I guess my question is: Did / do any Motoplat Electronic rotors come with puller thread sizes close to (either side) of 26mm? In other words, am I safe buying a generic 26 x 1.5mm puller- or could my mystery rotor possibly be 25mm- or 27mm, etc..? Duncan Quote Link to comment Share on other sites More sharing options...
legs Posted January 31, 2015 Report Share Posted January 31, 2015 Motoplat ignition fly wheel pullers are double ended 27mm & 30mm Quote Link to comment Share on other sites More sharing options...
berkshireduncan Posted January 31, 2015 Author Report Share Posted January 31, 2015 The Sammy Miller one I have isn't.. but is 27mm the only 'other' Motoplat size..? Quote Link to comment Share on other sites More sharing options...
kingscorpion Posted January 31, 2015 Report Share Posted January 31, 2015 Mini 6 flywheels use a strange puller. It isn't the 27 mm of the smaller montys, but a 26 mm one if I don't remember badly. It's a light electronic flywheel. Maybe too light for a trials bike, imho. Quote Link to comment Share on other sites More sharing options...
berkshireduncan Posted January 31, 2015 Author Report Share Posted January 31, 2015 Hi Kingscorpion- thanks for the tip. There's no reason to believe the rotor & stator came from another Montesa- presumably just some other 70's/80's European bike. Steve at Bradford Ignitions ('Motoplat UK') said the same thing- that the Mini 6 was maybe a little light for a trial bike- I guess because it was originally fitted to an Enduro / MX.. however mine has a heavy brass 'wedding ring' band sweated onto the outside of the rotor to add some weight. You said 26mm.. 1.5 pitch and Right Hand thread..? Quote Link to comment Share on other sites More sharing options...
zerorev3rev4 Posted January 31, 2015 Report Share Posted January 31, 2015 i had to get a 26x1.5 for a 307 with electronic ignition there is a set of around 12 pullers on ebay for not much more than what one costs Quote Link to comment Share on other sites More sharing options...
boghopper350 Posted February 2, 2015 Report Share Posted February 2, 2015 I have a beta zero with a mini6 ignition. i have 2 flywheels for it, one is a lot lighter than the other. The heavier of the 2 is quite a lump, so I would say plenty heavy enough for a trials bike, if you want, I can weigh it... just so that you know if one would be heavy enough if you wanted to source one. I can confirm that the thread is 26mm / 1.5 pitch normal thread direction. Sorry for not replying before, but I've had trouble logging in 1 Quote Link to comment Share on other sites More sharing options...
berkshireduncan Posted February 3, 2015 Author Report Share Posted February 3, 2015 Thanks, BogHopper The P.O. kindly got in touch and confirmed the spec. It has a Mini 6 set up- from a Villers 210 classic kart (the UK's longest running kart class, apparently) Luckily, my online researches had led me to a 26mm x 1.50mm R/H puller, which I've already ordered and is on the way. The P.O. had a whacking great brass weighting ring turned up and sweated onto the rotor; and IMHO the bike has bags of bottom end grunt. Thanks all 1 Quote Link to comment Share on other sites More sharing options...
kingscorpion Posted February 4, 2015 Report Share Posted February 4, 2015 Glad to see you've found the answer. It's a good ignition, and probably the brass ring compensates the original weight. Quote Link to comment Share on other sites More sharing options...
berkshireduncan Posted February 8, 2015 Author Report Share Posted February 8, 2015 Losing the will to live here.. My mystery 348 Motoplat electronic rotor doesn't take a 'Montesa standard' 30mm puller- and the 26mm x 1.5mm R/H puller I just ordered is fractionally too small. Aaarrgh!!! I don't want to use a 2/3 leg puller, for fear of messing up the sweated-on weight band, so before I try for third time lucky and order up a 27mm x 1.25mm R/H puller from BVM, has anyone got any further suggestions or input? The P.O. tells me my Mini 6 is 'the same as fitted to a Villiers 210 kart engine'.. although I haven't managed to find any rotor / puller specs for same online. Q) Has anyone ever come across a Motoplat rotor with a L/H thread- (or is the BVM unit likely to be correct) Thanks again in advance.. Quote Link to comment Share on other sites More sharing options...
boghopper350 Posted February 10, 2015 Report Share Posted February 10, 2015 i had to get a 26x1.5 for a 307 with electronic ignition there is a set of around 12 pullers on ebay for not much more than what one costs I have set like this... This guy knows what he's talking about. It's worth a try, they have many combinations of sizes / thread direction. Quote Link to comment Share on other sites More sharing options...
kingscorpion Posted February 11, 2015 Report Share Posted February 11, 2015 The reference is "7V", and it should be 26x150. At least if that flywheel is the same used in the Montesa Impala 2. Quote Link to comment Share on other sites More sharing options...
berkshireduncan Posted February 14, 2015 Author Report Share Posted February 14, 2015 I gave up on finding an internal puller to fit, and went with a 3-leg. It's very slightly dented the brass weighting ring, but I doubt it'll significantly affect balance. Stator & coil are away with Steve at Bradford Ignitions, so hopefully I'll be trialling again soon.. Quote Link to comment Share on other sites More sharing options...
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