What you have to remember is that you can't change or adjust one part without it affecting another and all circuits have to work in conjunction with each other and find that yin yang balancing point or happy medium. Needle jets are generally a non replacement part and suggest the carbs maybe worn so it might be better to find some good used carbs to replace the ones you have if the needle jet (hole where needle goes through) is badly oval and has lost it's roundness. Are you on the standard needles? There's also the float valves that can let too much fuel through if worn and these are replaceable. That suggests your too rich and the pilot is letting too much fuel through so you could either drop down a pilot jet size to lean it out which then allows some adjustment to fine tune and richen it up on the fuel screws or it maybe okay on the pilot size and too rich at the needle or worn needles and / or needle jets which is letting too much fuel into the pilot circuit and flooding it. Try it again with idle set at 1100/1200rpm's. IIRC you've set your idle rpm's too high. What's a guy to do in this situation? I'm all ears. Sure enough that went all the way in with no change to running speed of exhaust note either. Left that as it was and moved to the rear. I ended up screwing it all the way in and no change in speed or sound noted at all. With an 1800 rpm idle set I started adjusting the front carb. I fabricated a tool to adjust the pilot screws and have just followed the guide on this thread on adjustment. Long story short I've checked and cleaned all jets. All gone well other than a hesitation at light throttle openings which is really annoying. All MOT'd now and stopper mod done with new CCT's fitted. Hi Folks, anyone following my story on the welcome board titled "New to Forum" will know that I'm trying to resurrect a gift of a VTR and get it on the road. Both these models should mean you have 48 pilots. S registration was September 1998 to end of Feb 1999 so yours is most probably a 98 model which would make it a 'W' but it could also be an 'X' (1999 model). I apologise if this is a stupid question but how would you know what pilot jets are on an s reg 1000f? 1/4įor more info here's a nice write up on air/fuel ratios explained. Fuel Screw (Turns Out) Front 2.5 Rear 2. Fuel Screw (Turns Out) Front 3.0 Rear 2. Stock From Honda: Stock Filter/ Stock Exhaust / Stock Advancer The base setting would just be a starting point as every bike will be different due to many factors including engine wear (valve lash, carbon deposits, etc.) Altitude, temperature, humidity and each engine will need to be dialled in/adjusted accordingly for accuracy. With a 48 pilots because this is larger and allowing more fuel flow, then the fuel screw wont need as many turns to to get an even air/fuel ratio and smooth running and would be more like Front 2.5 Rear 2 1/4 turns out I know Honda soon updated to 48's and it was only the real early ones I think that came with 45's as stock. The base setting will be determined by the size of the pilot jet and the majority of carbs I have seen over here have 48's in them. Note these are approximate settings and every bike will be slightly different. One question - what is the base settings for the mixture screws ?Good question as in the workshop manual it says it should be Front 3 Rear 2 3/4 turns out with 45 pilots, but this is for Canada/California.
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