arfur Posted May 4, 2015 Report Share Posted May 4, 2015 I am trying to check the crank seals but the two screws on the small cover on the left in the picture have been butchered. Does anyone know what is behind that cover? I am guessing another bolt for the main cover at the very least. Thanks Arfur Quote Link to comment Share on other sites More sharing options...
bigshineybike Posted May 5, 2015 Report Share Posted May 5, 2015 It is only a decorative cover but does hide fasteners you need to get at. The same butcher that mucked up those screws probably didn't over tighten them. If you do not have an impact driver try hammering a screwdriver as you twist it.That should get them out. 1 Quote Link to comment Share on other sites More sharing options...
feetupfun Posted May 5, 2015 Report Share Posted May 5, 2015 on some other Montesas that share that same casting, that cover is the cover for the two-stroke oil injection pump Quote Link to comment Share on other sites More sharing options...
wobbler Posted May 5, 2015 Report Share Posted May 5, 2015 I've taken mine off - it has no purpose !!! Quote Link to comment Share on other sites More sharing options...
arfur Posted May 5, 2015 Author Report Share Posted May 5, 2015 Ah! I thought there would be some fixings behind there. I will give them a little gentle persuasion, failing that I'll drill them out. Then it looks like I get a nice little storage area.... Quote Link to comment Share on other sites More sharing options...
bothfeetdown Posted May 6, 2015 Report Share Posted May 6, 2015 Are the thread sizes for those screws the same as earlier models? If so they are hard to get hold of. Quote Link to comment Share on other sites More sharing options...
arfur Posted May 6, 2015 Author Report Share Posted May 6, 2015 Got the bolts out but the heads are knackered. Hopefully have something at work that will fit. I was assuming they would be special or rare bothfeetdown! Why would it be easy? 1 Quote Link to comment Share on other sites More sharing options...
arfur Posted May 6, 2015 Author Report Share Posted May 6, 2015 So now I can get the covers off I am looking at replacing the crank seals. I have searched for any instructions on this but have only found little bits and pieces. Has anyone got an advice before I start? Quote Link to comment Share on other sites More sharing options...
manchester uk Posted May 7, 2015 Report Share Posted May 7, 2015 (edited) Hi Arfur - just done the crank seals on mine with the help of TC members its an easy job but with a few difficult obstacles. Mainly you need holders, pullers and perseverance to get to them. Have a look at this thread. 349 Crank Seals G :-) Edited May 7, 2015 by manchester uk Quote Link to comment Share on other sites More sharing options...
arfur Posted May 7, 2015 Author Report Share Posted May 7, 2015 Hi G Thanks for the info and the link to the post. I've ordered up new parts and got both cases off ready. Just need to rip it all apart. The left hand side has been done at some point as there's lots of instant gasket around! Still going to try and get the flywheel and drive gear off again. I have a couple of questions though. What torque did you use to put the nuts back on again? Did you take the clutch off? If so is as simple as undoing the nut and pulling it off the shaft? Thanks Arfur 1 Quote Link to comment Share on other sites More sharing options...
manchester uk Posted May 8, 2015 Report Share Posted May 8, 2015 Yes I took the clutch off as I wanted better access to the primary gear. It's also a 'morse taper' type fit with key so once the nut is off some just need a bit of persuasion, I used a big 3 leg puller. Torque settings I used to re fit were Clutch - 14.5-18 ft.lbs Ignition (LHT) - 87 ft.lbs Flywheel - 58 ft.lbs you may find this useful - most of it is the same as the my hard copy of the parts manual for the 247 (however its been translated to english) http://teflonmike.craywiki.co.uk/0_Lo_100_Library_005_Cota_Book.htm#ENGINE Quote Link to comment Share on other sites More sharing options...
arfur Posted May 8, 2015 Author Report Share Posted May 8, 2015 Thanks G, just bought some pullers so its all systems go for tomorrow. Quote Link to comment Share on other sites More sharing options...
arfur Posted May 10, 2015 Author Report Share Posted May 10, 2015 Replaced the crank seals. Tuned up the carb and now when I twist the throttle the engine goes faster instead of dieing. Got a trial booked for next Sunday to see if it's any better. Happy days Thanks for all your advice, especially G! 1 Quote Link to comment Share on other sites More sharing options...
arfur Posted May 10, 2015 Author Report Share Posted May 10, 2015 Are the thread sizes for those screws the same as earlier models? If so they are hard to get hold of. They were M5. Got loads of stainless ones at work. Quote Link to comment Share on other sites More sharing options...
bothfeetdown Posted May 10, 2015 Report Share Posted May 10, 2015 (edited) They were M5. Got loads of stainless ones at work. Edited May 10, 2015 by bothfeetdown Quote Link to comment Share on other sites More sharing options...
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