Tcr1992 Posted May 25, 2017 Report Share Posted May 25, 2017 Hi there. Going to look at a fantic section 125 but cannot find much out about them with Google. Anything to look out for? What oil ratio should I use? Cheers Quote Link to comment Share on other sites More sharing options...
breagh Posted May 26, 2017 Report Share Posted May 26, 2017 Can't be many about I've a 250 and run it about 80.1 . Frames are poor look for cracks and look carfully at the rear of the engine where it bolts on to the swingarm.. Imagine some stuffs really hard to get for them as they're so rare. Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted May 26, 2017 Report Share Posted May 26, 2017 It's nice to have something a bit different but, frankly, I would heed Breagh's advice and employ the proverbial bargepole. Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted May 26, 2017 Author Report Share Posted May 26, 2017 Cheers for the advice. My main thought is sourcing things like a new piston could be a right head ache. Quote Link to comment Share on other sites More sharing options...
fantic240motor Posted May 27, 2017 Report Share Posted May 27, 2017 Love my 250 Section but I'd not entertain a 125cc bike due to the possible lack of power to lug my 6'2" 14 stone around. Don't know if the 125cc Section suffers as bad as the 250cc bikes but as mentioned expect either damage or repairs to rear engine mount and frame down tubes. Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 2, 2017 Author Report Share Posted June 2, 2017 (edited) I ended up buying the bike. It was cheap so it will e my little project. The engine is a fm361 Things I know so far that need doing are as follows. Fork seals (I need to know how much oil in each fork) Clutch slips (does the clutch in this fit other models of bikes? May be easier to find the clutch plates for another bike) Front brake disc has play on the collets it sits on. And a slight weep of oil from the inspection window for the gearbox. Other than that it is all there, a bit tatty but I will enjoy tarting this up a bit. Any help is much appreciated Tom Edited June 2, 2017 by Tcr1992 Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 2, 2017 Author Report Share Posted June 2, 2017 1 hour ago, oni nou said: Search Engine. Nothing comes up for fm 361 it was the first thing I done. Thanks for your help ............ Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 4, 2017 Author Report Share Posted June 4, 2017 On the way I have coming. Fork oil and dust seals. (Just need to find out how much oil per fork to put in. I'm thinking of going with 7.5wt due to me only being 64kg) Front mounts for the floating disc Clutch springs (I'm going try new springs first to fix the slipping before forking out for the plate set) 40t rear sprocket to raise the gearing a bit as it's a road legal bike so I'd like a bit more cruising power as the closest place for me is about 10 miles. Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 4, 2017 Author Report Share Posted June 4, 2017 Picket up some putoline fork oil in 7.5wt and some putoline light gear oil today ready for when I get down and dirty. If anyone has an idea on how much oil goes into the fantic section marzocchi forks it would be a great help. It appears the 125 uses the same forks as the 249 if that is any help. Quote Link to comment Share on other sites More sharing options...
breagh Posted June 8, 2017 Report Share Posted June 8, 2017 Hi as mines got Beta foks on it I can't really help, however what I generally do with forks is guess and I'm never far off. Try about 275 ml in each leg and see how they feel you can always add a bit more if they're bottoming out. Check there's clearance at the clutch lever as this will cerainly cause clutch slip.cheap fix if it is. Cheers. Quote Link to comment Share on other sites More sharing options...
fantic240motor Posted June 8, 2017 Report Share Posted June 8, 2017 Is the clutch slip only when you pull 5th or 6th gear? New springs are always a good idea but have a look at the plates while you have the springs out. The metal plates can wear too especially the alloy type. If I remember right the new friction plates are 3mm thick. If you've not already aware of how to clean off the glue and tidy up the friction plates have a search for "Beta clutch fix" and give the friction plates a look at. It can reduce clutch drag and slip under load. Raising the overall gearing will help your road speed but will obviously have an adverse effect on slow speed trials riding. Might be hard for a 125cc to pull the higher gearing over obstacles too. I've never rebuilt Section 40mm Marzocchi forks but I have a pair that need seals so please let us know how you get on. Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 14, 2017 Author Report Share Posted June 14, 2017 I'm still waiting on the seals to turn up from France before I can do the forks, I found a post that says they take between 190 and 210mm of oil so will use that as a starting point, easy enough to add a bit more if need be. The clutch was slipping in 4th 5th and 6th. But with the clutch slip it turns out the pressure plate was sitting at an angle. This was caused by the push rod not being fit to the pressure plate properly, The part the push rod screws into was not slotted into the pressure plate causing it to sit on the wonk. The clutch itself looked perfectly fine with lots of meat on the friction plates. Since sorting the pressure plate out the clutch now bites hard, it will quite happily pop up the front wheel now where as before it would slip. The clutch springs were already beyond worn since there was a variety of washers on them so it was a good thing I got some springs for that. I do realise raising the gearing will have an affect on being able to slow down to a crawl without slipping the clutch but I am willing to give it a test to see how well it copes as it would be nice to have a bit of fun on some local ish byways. It's got alot of torque for a 125 so I think it should fair ok. Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted June 14, 2017 Report Share Posted June 14, 2017 If you raise the gearing by fitting a bigger front sprocket then you can quickly and easily restore trials gearing for an event. Quote Link to comment Share on other sites More sharing options...
Tcr1992 Posted June 15, 2017 Author Report Share Posted June 15, 2017 Turns out someone has put 428 chain and sprockets on the bike. I didn't bother checking when I bought the rear sprocket as I expected it to be standard. So I've picked up a 12t 520 front sprocket with stock being 11t I believe. Just need to grab a 520 chain and I'm good to try it out. Worst thing that can happen is I'd have to grab a 11t front sprocket if it's too over geared which isn't an issue. Anyways the fork seals and brake floaters have turned up so I think that's what I will be doing on Friday along with new pads front and rear. After that it will be new (second hand) master cylinders for the clutch and front brake as it currently has ones with external reservoirs which is a silly thing to have on a bike of this nature, I've already bent up the reservoir mounts from falling off the bike. The rear brake master cylinder has some serious damage from what looks like the bike being used without a chain tensioner, I already have an ajp master cylinder in my box of spares from a geared moped that uses the same calipers so at some point il swap that over too. Also I've found a original silencer on a Italian website that is for this bike which I must grab as mine has a moped silencer bodged on using a piece of rubber to clamp Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.