The 50

[mr bucketracer]

Phil Turnbulls; but you'll have to get in a time machine,

i don't want to buy the shop just a rod kit or 2 (-; the guys voice drives me crazy on the radio !

[F5 Dave]

An enquiry to MXparts.co.nz might turn something up perhaps? Seems to have a bunch of stuff aimed at MX but may have other bikes covered & he is cheap. I've used him for dirtbike parts & was well good.

[cotswold]

I have been attacking the cases and also the spare cylinders intake and was wondering how I was to get at the ports, by chance mr. photo Chris mentioned that he had a dentist drill and burrs but was unable to use the angled bit due to the bigger burrs not fitting. We decided I should attempt to modify one of the not so desirable burrs and see if I could retro fit it. Used my lathe a grinding disc from the dremell and a small file and it worked, took ages on the 1st one but have a week off so will do some of the others and get stuck into the porting

[chrisc]

Did you let your dog chew the end of it until it fit the right angle head?

Nice one mate, put it to some good use

[F5 Dave]

Ahh yes, I recognise those dentist heads. just apply gently & let the speed do the work as the gears inside aren't super strong. Drop of oil on them is good & do the head up tight or it will vibrate loose.

[cotswold]

Tim, have you had a look at KTM50sx pistons ??
12mm pin .8 ring 39.5mm std bore

I bought one of the KTM 39mm pistons and it looks very nice. I have decided to junk the 40mm cylinder and work up the standard one.

Tee Zee spotted something odd with my 2 cylinders today, the MTX50 one has no transfer holes to take coolant to the gallery on the underside of the exhaust port whereas the NSR50 cylinder does, will have to get the drill out and remedy Mr. Honda's mistake.

PS. dont tell Chris but I snapped one of his Burrs trying to modify it. Shhhh

[F5 Dave]

just with the piston, turn it upside down & check clearance to the small end. The hondog piston slants in at the top restricting bearing axial movement but the sm bearing is quite narrow.

[cotswold]

just with the piston, turn it upside down & check clearance to the small end. The hondog piston slants in at the top restricting bearing axial movement but the sm bearing is quite narrow.

I did check that, in the photo I have used the Honda pin and small end bearing and can see no noticeable difference. ( with side movement ) It fits nicely on the rod and covers all the holes in the cylinder so am hoping I have a winner. Bonus being I bought it next door to work.

[cotswold]

My pipe turned up today from a country far far away. A big thanks to the person who facilitated the purchase.

[cotswold]

I have been trying to find a legal Rod kit with a decent bearing for the 50 but not much available. I ended up buying a prox Kit and having a bearing made to suit the MTX50R, not the cheapest exercise but as I have one crank with a stuffed big end and the 2nd showing signs of defeat it will probably work out in the long run.

[husaberg]

I have been trying to find a legal Rod kit with a decent bearing for the 50 but not much available. I ended up buying a prox Kit and having a bearing made to suit the MTX50R, not the cheapest exercise but as I have one crank with a stuffed big end and the 2nd showing signs of defeat it will probably work out in the long run.

Lead 125 or maybe 80 has a CR80 big end (same exact part number) i remember they are an odd size.
I can check i part a parts book at home?

18mm what is the MTX50r.

[cotswold]

http://freetech50.com/

https://www.facebook.com/groups/20740954175/

[TZ350]

Some great looking 50's, love em.

[cotswold]

https://www.facebook.com/pages/The-B...49827285189711

A page about suspension set up

[cotswold]

A parcel arrived today, The brakes look a little farked but maybe rebuildable. Who knows what number RS steering bearings are and can I get them from a non Honda source?