And although I do believe the K is a far better mixer, it was just too much for me on the 2.9. I did try it briefly on the '07 2.9, but it was just to much power across the range, specially where I live, in the lower revs. With reguard to Clav, I find it rather interisting your settings.

Point being, you may well find a need to lean the kiehin main as well running the boyesens.

This is with the timing set back a bit for smoothness, but it would clean out and rev to scarey highs! So much so that I actually went back to a 115 to limit the revs. As an example on my '07 I had to drop from a 118 to a 110 with the dellorto. Getting back to the original post, running the Boyesens you may find you need to lean the main jet quite a bit in order to rev out cleanly. I tried boysens but is didn't run right and i wasn't interested in changing jets at that time. I think the only difference from a 08 is the 07 caby has a different head Slide measures 3.5 mm (stamped #4 on bottom) ДЇloat height - Carb upsidedown - tilt 45 degrees - the float should be resting, but not depressing, the spring-loaded float valve pin - measure from flat point where it joins the float bowl to top of float 19mm.Дoes anyone know what settup Pat Smage uses on his 08? Edited Jby clav3Дoes anyone know what settup Pat Smage uses on his 08? some will still use.ДЈ8 pilot also works but turn out to 1 and 1/4 to 2 turns. JJJ needle too lean midrange with pinging. easier to handle still very fast power when opening the throttle due to L needle tapperДЈ5 pilot 3/4 to 7/8 turn out, JJH needle 2nd clip groove from bottom, 3.5 slide, 112 main very smooth.ДЎ15 main also works with all these settings Can use a 3 slide with pilot 1and 3/4 turnsДЈ5 pilot 1/2 turn out, LJH needle middle clip, same slide and main. The two nozzle needles D49 and D53 differ significantly in the change of the needle diameter, the D53 is much steeper.Some variations - 2008 290 Sea level Boysens and Kiehin PWK 28 existing manifoldДЈ5 pilot 1/2 turn out, LJJ needle 2nd clip groove from bottom, 3.5 slide, 112 main too much power for begginers try and you'll see. The needle clip indicates the position at which the clip is placed on the jet needle counted from the top position. This difference results in the comparatively large diameter of the main nozzle and the large area with high steps for tuning. This air reaches the atomizer through the air nozzle at the bottom center at the connection to the air filter and is fed directly above the main nozzle. If the machine stutters and runs too rich, the man jet can be reduced in steps of 5 down to 135 вЂ‹вЂ‹.Д¬ompared to the PHBH 28, the VHST has an atomizer nozzle type вЂњHNвЂќ with holes for mixing the gasoline with air in the atomizer.

The main jet of 185 listed for derestricted bikes is indeed very large вЂ‹вЂ‹, for the Euro3 standard in Germany a 170 main jet is used вЂ‹вЂ‹. These pictures show connectors, components and jets of the VHST 28Д¬onnectors and Jets on the VHST28 Main Jet RS 125 RD/RM without RAVE вЂ‹вЂ‹ вЂ‹вЂ‹ вЂ‹вЂ‹ДЄ вЂњ-вЂќ in the table means that no information was given for the respective part in this variant. On the RD and RM models the carburettor also has a carburettor heating, a TPS (throttle position sensor) and a connection for an additional idle air system.

Use at your own risk.ДЇor the DellвЂ™Orto VHST 28 CD, which was used in the last models (RM and RD), there are several setups available. Any liability for any kind of damage that may be related to information from this website is totally denied. This blog is operated by a private individual without commercial background and without any benefits. These are self-written repair instructions, hints, tips and tricks for the old Aprilia RS 125 with two-stroke engine until year 2012. Please note: These pages are part of my RS 125 Workshop Page on my web blog and they are not related to the manufacturer Aprilia/Piaggio.

Dellorto phbh 28 main jet