2 techy questions for you

[spondonchris]

OK number one, are the German spec rd350lc exhausts 0 stamped with orange dot restricted or is that just the German 250 pipes ?

number two.....just finishing my bike im going to run Swarbricks and a standard airbox on 31k YPVS carbs, i was going to raise the needle a notch but im after a main jet size to go with as a starting point. Thanks for your help in advance guys.


Also while im here just a suggestion but is it maybe worth putting a sticky up with all the stock jet sizes plus advisorys on....with microns fitted etc. I also have 4LO1 carbs and have no idea what the stock size is meant to be on them either lol. I have seen the jet guide on here but its too in depth i feel, just a basic guide would be usefull for members. Save a load of people puttin threads like mine on too haha.

[Tone]

The standard sizes for the 4l001 carbs are

Main jet = 220
Jet Needle/Clip position = 5k1-3
Needle jet = P-2
Pilot jet = 22.5
Air screw (Turns out) = 1 and 1/2
Float Height = 21mm

Hope this helps. Tone.

[oldelsieboy]

Mar 30, 2010 18:04:15 GMT 1 spondonchris said:

OK number one, are the German spec rd350lc exhausts 0 stamped with orange dot restricted or is that just the German 250 pipes ?

Only pipes stamped 4L2 are restricted

OEB

[spondonchris]

Thanks guys any info on the 31k carbs appreciated or if anyone else has used this setup, 4lo350 engine. standard airbox, Swarbrick pipes, YPVS carbs.

[dredge3]

Do yourself a big favour...buy a Haynes.
31k0
main jet 240
air jet 0.7
jet needle 5K1
needle clip 4th groove from top
throttle valve cutaway 2.0
pilot jet 22.5
air screw 1 1/4 turns out
starter jet 80
float hight 21
fuel level 26
idle speed 1200 rpm

[spondonchris]

Haha im not daft as a brush... but buying a YPVS Haynes for jet sizes would be a tad silly, thinking on i do have an LC350 one somewhere so im guessin the 4LO1 carbs info would have been in that. The exhaust info wouldent tho i dont reckon.

[spondonchris]

Yea plug chops the only way in the end, christ im used to 1216 kits Flatslides and Gas flowed heads feel like im flamin 18 again messin with these things. Oh well i got a few engines to go at now in diffrent stages of tune so if i bang one its not the end of the world, think il shove the 250 engine in a go cart or summat hahaha.