RD125

[Johnwebley]

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?

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 no,it was a not quite started project,no clutch cable,no chain,I did see and hear it run,it just blipped the throttle,sounded ok,
but no high revs,and no load

[Johnwebley]

just spoken to Nrp carbs,Manchester,

 quoting carb model ref 39690,

  he then explained early RD twins had a variance in mainjets,should have had either a #66 or #68,

 not the #94 listed

hopefully this will sort it !!

[hairygit]

I certainly hope so with all the work you put into it.

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[Johnwebley]

I certainly hope so with all the work you put into it.

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 so do I,

 but if not,well S**T happens ,it will mean a few more weeks sorting !!

[MarkCR750]

I think you should be OK John, if your seals were shot it would struggle to tick over and be hard to start, when you dropped the needles it improved so I recon it's just way too rich, I wouldn't run it much before getting the smaller jets as the excess petrol will be washing the bores etc, that's if it's got separate fuel to oil .

[Johnwebley]

fitted a pair of much smaller main jets,

 seems to rev out now,
but as its not MOTed,or Taxed ,(free historic) I can't run it on the road,

 need a few more checks,and then go for MOT,

 

[ffoy]

Hi John. Firstly I've not been reading in detail all the posts you've made re the running problems but just had a quick look at the last post about main jet sizes then had a look at my manuals.

A table in the 1st RD125/RD200 manual shows main jet is #66 (#64 high ground) for the 125 and #94 for the 200 (#92 for high ground). That may explain the confusion with #94 size mentioned earlier.

[Johnwebley]

Hi John. Firstly I've not been reading in detail all the posts you've made re the running problems but just had a quick look at the last post about main jet sizes then had a look at my manuals.

A table in the 1st RD125/RD200 manual shows main jet is #66 (#64 high ground) for the 125 and #94 for the 200 (#92 for high ground). That may explain the confusion with #94 size mentioned earlier.

thanks for this,it does explain the confusion ,
 Andy at NRP also helped ,

 these strokers are so confusing !!!

[Johnwebley]

finally got the main jets ,(66)

 now I will book MOT for wednesday,

 hopefully the weather will co-operate !!

 as I want to take the Honda for a night out to Stow on the Wold,

 latest pics and news later

[Johnwebley]

OK,the little RD is MOT ed !!

  took the long route there,and back !!  so put 30 miles ,the brakes started to bed in OK,amazing how hot the drums get !!

 initially the motor was sluggish,but with some encouragement it would spin up to 9K,

 cruising at around 7,500 RPM it started to clear out the oily exhausts,
after the first 15 miles the removable baffles were almost dry and the motor was revving much better,


 lets see how it runs with a few hundred miles on it,this is how it looks after its 1st run !!

[mike the bike]

Well done John. Enjoy it while we have the good weather (I was in Hereford today so I know).   
Do you plan on restoring anything elso to keep you busy in the winter or are you short of garage space?

[Johnwebley]

Well done John. Enjoy it while we have the good weather (I was in Hereford today so I know).   
Do you plan on restoring anything elso to keep you busy in the winter or are you short of garage space?

 well,garage space is short,I quite fancy a Suzi T20 super six,

 or  a small Kwaker triple,250 or 350,but they are getting silly money,not quite "sandcast" level !!

I hope to use the RD for some time,its perfect for local country roads,

[Johnwebley]

know the little RD is on the road,making sure it runs well,and behaves,the project is finished

 based on notes and costings,the initial purchase cost of £640,parts,shipping from all around the world,replacing badly rusted items,
the total is a shade over 3 grand !!

 they have a saying in light aviation,"how do you become a millionare? start with two million !!"

 it was a money pit,but it was fun,taught me patience,planning and a few skills I never had,

would I do it again?

 probably !!

hope the sun shines so I can get out on it !!

[mike the bike]

Also it's a worthwhile hobby.  Other people with their hobbies pay through the nose for stuff like fishing rods, ham radio sets or hang gliders so why not us.
Personally, I always have a sense of achievement rescuing a wreck, even if I've lost money and sold it on.

[Nurse Julie]

I think it's a very worthwhile hobby. We have some very big 'shoots' up our way and for the same amount if money you spent on the RD you could go shooting for 2 days and come away with a brace of Pheasant that you could buy in the butchers for less than a tenner. I know what I would rather spend my money on.