RD125

[Johnwebley]

been playing in the garage today,

I have been having issues with the throttle cable,it is one cable from twistgrip to a splitter,then 2 carb and 1 oilpump cable,try as I might
I could not get this to work properly,each time both the carb cables detached inside the splitter unit,

 the splitter outer tube,and nylon inner have some playso I surmizzed the inner was tiltingand the out flexing allowing both cable nipples to pop out !!

so decided to make a new inner unit,using nylon bar,

check the pics,and yes,it works great !!

[hairygit]

Very resourceful, well done John. Nice to see you don't let little issues get in the way of your restoration. Keep the pics coming!

[mike the bike]

I was thinking about designing and making something like that after I saw it, well done.

[Sgt.Pinback]

Nice bike, nice work!

here is the 1972 AS3 from a friend in the neighborhood. 
You need min. 5.000 U/min to get of, but a 6.000 the wheel comes up. Much fun with 15PS

[Johnwebley]

Nice bike, nice work!

here is the 1972 AS3 from a friend in the neighborhood. 
You need min. 5.000 U/min to get of, but a 6.000 the wheel comes up. Much fun with 15PS

 the RD is almost identical with the AS3,infact it has an AS3 engine frame number,the difference being are reed valves in the induction tract,
maybe to give a bit more low down !!

[Sgt.Pinback]

Forgot to say, first owner 1972 - 1978 of that AS3 was Karl Kling, Formula 1 and Carrera Panamerica driver with 300SL.

Nice reg. number


BTW: Sorry for OT

[Johnwebley]

after almost 12 months,I got her fired up ,

 used the remote fuel bottle so I could have access to the motor and carbs,little bit of adjustment,synced the carbs,all the electrics worked,battery seems to charge,all the gears select ok up and down the box,
major issue,the clutch slips and drags !!!!as it didn't have a clutch cable ,or chain when I got it ,I couldn't check,but the clutch grips enough to kickstart it,
will get the r/h side cover off and see whats what,
tried to take a few pics of clouds of blue smoke,but it is not to much to see,,

[MarkCR750]

Could just be the plates sticking with a bit of luck John, should be an easy fix whatever's causing it.

[Johnwebley]

Could just be the plates sticking with a bit of luck John, should be an easy fix whatever's causing it.

 well,the clutch seems to work OK now,stripped it and re-assembled,only just realised its possible to kick start while in gear !!

 just going around finishing all those small jobs but its looking a lot better than 12 months ago

[Johnwebley]

almost finished,

 ticks over really nicely,clutch now sorted,( I think)

starts OK
the carbs have been re-built using Keyster kits ,KY-0160 ,with #94 main jet,but the engine will not rev past 6K,seems far to rich,
any ideas ??
check out the pics,

[Johnwebley]

morning all,

HELP and advise required,

the little RD is not running as it should,low down is great,but no top end,we all know these should rev their "sphericals" off ,but this will not
rev about 6K,

so I checked the float level,well within tolerance 20mm +or - 2mm,timing checked,new plugs,starts beautifully

so I tried to see what happened as the fuel level dropped in the bowls,and as it got to the bottom,along came the revs,revved really well,so I am guessing its running very rich!!

dropped the needle to the max,clip at top,bit of improvement,

it has standard airbox,new foam filters,no difference if I take out the foam,
the carbs are Teikei 18mm,

 main jet is at #94,as reccomemnded,
but on the US model it is #66
and a later version (DX)  its #82

I guess I should try the #82 jets to see what happens,

do you know any thing else

I have posted on another forum,but despite lots of views,no advise,so I am sure the sohc bunch can help !!!

[hairygit]

94 does seem like overkill for what is effectively a 62cc single. I think I would go midway between the U.S. and the DX, say 75/78 and see what happens, but obviously being a 2 stroke running too lean is to be avoided at all costs! (Learned the hard way with a T500 Suzy many years ago, both pistons holed!)

Sent from my X6pro using Tapatalk

[hairygit]

Another thing just came to mind, did you have the crank rebuilt with new labyrinth seals, or did you chance the originals?

Sent from my X6pro using Tapatalk

[Johnwebley]

Another thing just came to mind, did you have the crank rebuilt with new labyrinth seals, or did you chance the originals?

Sent from my X6pro using Tapatalk

 I took a chance,when I stripped the top half of the motor,internally it looked as new,it is .5mm oversize pistons and bores,the pistons
looked as new,and the crank felt smooth and solid,

thinking of going to #80 MJ to see how it goes

[hairygit]

Okay, but off jetting doesn't sort it, bear in mind the labyrinth seals will probably be as old as the bike, and if they are hardened/leaking it will never run right. Did you get a chance to ride it before buying it?

Sent from my X6pro using Tapatalk