This table gives the conversion for the main jet. Big difference between the two. The pilot jet that came with the dj kit is a 37.5, is it a direct conversion or is it a lot larger than the 37.5 made by mikuni? I am 3 3/4 turns out on the pms adjustment with the mikuni 35 jet installed and the mikuni tuning manual states
3 1/2 turns should be maximum, if it is more than that the pilot jet is too small, the next size that I see would be the 37.5. I have the dj 37.5, should I order the mikuni 37.5? The pilot adjustment screw at this setting (3 3/4) is fairly loose, I am using the Barons adjustment screw with the thumb adjustment, it has moved to 4 1/2 turns out in a long distance ride. I'm concerned that I will loose it at some point in time.

Could you please list the current setup of your carb.

Doc

Current set up is:

DJ needle clip on 4th groove and one washer under spacer
main jet Mikuni 170
pilot jet Mikuni 35
pilot screw is Barons 3 3/4 turns out

Exhaust is V&H slash cuts with baffles
Air filter is the one Mr. Cancilla did the article about, K&N filter attached to carb with home made bracket.

Looks 'normal'.

Could you explain how you are setting the PMS.

Your thinking is correct .... if your optimum setting for the PMS is more than 4.5 you normally look to a larger pilot jet to get the PMS in more.

Doc

I used the method described in the dialing in your PMS in the tech articles. After I got to the point of no backfire on decel, I had to turn the screw out about another 1/2 turn to get no hesitation at throttle. This also gave a little better idle. I'm concerned that the screw is going to fall out?? At the present I have a 2" piece of rubber gas line slid over the thumb screw with a reference notch at the bottom (easier to adjust) with a thin piece of wire attached to the bottom of this gas line and then secured to the small copper tube to the left bottom of the carb to keep it from turning
I gather from what your saying is that up to 4 1/2 turns is normal? if so I'll leave it set as is.

sundance wrote:
[quote]I used the method described in the dialing in your PMS in the tech articles. After I got to the point of no backfire on decel, I had to turn the screw out about another 1/2 turn to get no hesitation at throttle. This also gave a little better idle. [\quote]

You must have the idle set to about 900 rpm and the bike hot to do the adjustments.

For the hesitation just off throttle (just starting out) you need to adjust the accelerator pump rather that turning the PMS out. Try turning the accelerator pump screw in 1/2 turn at a time and test.

I gather from what your saying is that up to 4 1/2 turns is normal? if so I'll leave it set as is.

No ... ideally you want to be around 3 as that gives you some adjustment for the cold/warm weather changeovers.

Doc

Well, I have part of the problem fixed, I guess! I started setting the pms up from 2 1/2 turns out, bike good and warmed up. I just took a long ride and stopped and adjusted the pms until I think it is where it is supposed to be, no popping on decel and starts off with no hesitation. Issue I have now which I didn't have before is that (noticed this when I was checking for popping on decel) in 1st and 2nd if the bike is run up to high revs it coughs near the top of the rpms, also between 50 and 60 it (for want of a better word) lurchs, also in 2nd and 3nd when staying within the neighborhood speed limit (35) I have to hold the throttle open and get a rumble to keep from lurching. I know it sounds goofy, and am sure it is an adjustment I'm over looking. It seems I go from one problem to another. I'm new at this, it seems that if I get it running right I just have to mess with it until I screw it up again. I want to port the manifold but am not sure if I should until I get this issue resolved?

problem resolved. Changed main jet to mikuni 165, clip in 4th slot.

Well that was easy.

Sorry I didn't get back to you but I'm on the road and internet availability is sporadic. My planes late and luckily the airport has free internet so I'm trying to catch up.

Doc

I know how it is when you have to travel. My last two years before I retired was spent on the road, two weeks away-3 days at home.
I went to the tech articles and printed Bulldogs Carb Jetting Primer. Good information and to the point. I'm still out more than I want to be on the pms after all is said and done, 3 1/2 turns but I can live with that I guess it is what it is going to be.