Hi All, Hope the following advise will assist a lot of you with carb problems. As i have said before i had a over fuelling problem. I think i have finally sorted it out. The following transpired: Balanced carbs with ball bearings in jig. Checked all jets those i could)and are the following: Main Jets: 1&4 102.5 2&3 100 Jet Needle: all have 5CT7 written near the top.I also dropped the needles to the lowest. That is the little circlip is at the top most slit) Pilot Air Jets: 105 Pilot Jets: 12.5 Pilot screw as always 3 turns out from full in Starter jets: 37.5 The emulssion tubes all have N-8 written on the side. Once all this was done came the test. Started using choke as carbs were empty. Went for a spin and NO i repeat NO ob=verfuelling from pull off til 160kph on the highway. I also went through town and all went superb. Last advise: check ALL the jets. Dont take it for granted that they are what they should be. I also put in the air filter box with my own air filter element in. it is from a fuel injected car and is as close as i can get it to the size of the original. All i had to do was cut a piece of perspex to the size of the air filter box, used the same seal and cut out for the new filter. I then sealed the filter element wit silicon sealer. If any of you want to see the mod please send me youR e-mail address and i will send some photos. I dont know if TiBuS has posted any of my info on the site yet. Ciao for now, Happy Cruising, Trevor.
I really hope the info helps others. The filter element is a FRAM filter and the part number stamped on it is: CA5814. The needles did not seem to be worn or have notches in them.(that is to the naked eye) I did have a second set of carbs for spares and yes those showed signs of wear you could see.Could send you pictures fi you send an e-mail address.
Good idea to post this trev, but I thought that the two middle carbs ran richer, not the outer ones.. Due to overheating issues many multi-cylinder automotives run their less exposed cylinders richer, and thus cooler. Perhaps I'm wrong. I'd just like to know if this theory applies here.
Hi Timbus, I have left the carbs main jets the same as what the info i have says. The two middle ones are 100's and the two outer ones are 102.5's This the two inner cylinders will run a bit leaner not richer. Yout theory seems to make sence but then i am only going by the manufacturers info.
I just found out my ISP has a member page, Trev. Could you send us a few pics of the different jets, and their locations? I could post them here. It would greatly help myself, and more than likely others. Honestly I have no effin idea where the starter jet is...
Hi Timbus, I will take some photo's tonight and send them to you via e-mail like i have done the others. I will also indicate which ones are what like i did with the carb Jig and the angles. Ciao for now, Trevor.
PICS!!! If a moderator could hijack the second post and move this up it would be appreciated =D Koma edit: consider it hijacked. <!-- s:rofl: --><img src="{SMILIES_PATH}/icon_razz.gif" alt=":rofl:" title="Rofl" /><!-- s:rofl: -->
i dont get it sorry. So the 37.5 n stuff is 37.5mm? and is that the length of the needle or how much it needs to be turned out? Also how do u remove the floats? just pull them i guess? I was reading in another post u turn out the jets 3 360 degree turns out aafter cleaning? how does this apply to these photos? Thanks Heaps! Troy <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->
The number on the jet refers to the size of the hole, I don’t know what units it is measured in though. You can buy different sized jets or if you are really keen get a drill bit set to modify ones you already have. The idle jets are a little bit different from the others as it is adjustable with a screw, that is the only one you can adjust. All other jest should be screwed firmly into the housing. The idle jet adjuster screw can be seen from the rear of the carburetors without removing the float bowls.
Thanks Ciaran <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s --> where abouts is the idle jet? do you adjust it with a screw driver or something else? Is it the middle brass bolt? the one which the needle sits in? Thanks <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->
Nope, it's on the outside of the floats. Have a look for a small hole in each carb, below the drain hole. There's a flat head screw in that hole. Thar's your idle jet. Actually. Have a look at the pic above. See the big pokie-outie bit of metal just to the left of where it says "Main Jet: <blah>"? (NOT where it points to. Where the writing is located) Well IN that pokie-outie cylinder of metal is the idle mixture screw.
Oh Sweet, thanks for that Timbus, ill have to pull that out n give it a clean i think <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->
i can see zip zero nadda ! pretty keen on seeing what n where u have the 100's and the 102.5's...is there any other way to veiw these pics?? (thats if thats what the pics r of...)
