10-08-2021, 04:44 AM
Some good info above. I've been building/modifying bikes for the past 51 years. A few tips that might help.
1. What ever anyone might tell you otherwise: It is possible to get a street fighter running correctly without an Airbox. It takes good Ears and alot of patience.
2. Before you start changing needles, pilot and main jets first block the slider air vents to prevent carb slide flutter. Then start with the rest.
3. Decide what you want to achieve. Do you want low end speed or high end speed. The normal carbs are good for low end speed. 0-60 in about 1 second is possible with the standard carbs. If you want high end speed think about larger carbs. But if you start changing things other performance aspects with be effected.
4. The most efficent way to generate speed is to reduce weight! So think about cutting everything off the bike you don't need: Ignition block (Use a relay with remote), Saw the back of your bike off and move everything under your tank. Buy a lithium battery. They are about the size of your hand, weigh nothing, cost nothing and give a kick like a mule.
5. Instal (to start with!) an A/R sensor. This will then show you if your running rich or lean. Once you've got the bike to perfection add 4 lambada sensors in the down pipes and start rejetting again. Every clinder is different. 4 in a line will usually mean the two inside cylinders are running lean(er). It's takes patience. Do you need a dyno to test? Hell no. Instal an app that measures accelation by speed. And keep adjusting until you're happy!
6. Don't ever forget to check your carb fuel hight. Too high and you'll flood at low throttle. Too low and you'll run lean. The higher the float level measurement (ie 15mm) the lower the fuel level. The lower the float level measurement (ie 10mm) the higher the carb bowl fuel level.
7. Check your carb syncronisation!!! This is crucial! Make sure no springs are missing!
8. Once you get it right start thinking about your rear tyre traction. Your street fighter will be so fast that your rear shoe will slip. Don't forget that if you give full throttle and let the clutch out your bike will (believe me!) go vertical and you horazontal in an ambulance.
9. Once your tuned to about 0-60 in about a second start worring about cars hitting you that turn on to the road. They don't expect you to reach them so fast!
10. Don't get yourself killed!
1. What ever anyone might tell you otherwise: It is possible to get a street fighter running correctly without an Airbox. It takes good Ears and alot of patience.
2. Before you start changing needles, pilot and main jets first block the slider air vents to prevent carb slide flutter. Then start with the rest.
3. Decide what you want to achieve. Do you want low end speed or high end speed. The normal carbs are good for low end speed. 0-60 in about 1 second is possible with the standard carbs. If you want high end speed think about larger carbs. But if you start changing things other performance aspects with be effected.
4. The most efficent way to generate speed is to reduce weight! So think about cutting everything off the bike you don't need: Ignition block (Use a relay with remote), Saw the back of your bike off and move everything under your tank. Buy a lithium battery. They are about the size of your hand, weigh nothing, cost nothing and give a kick like a mule.
5. Instal (to start with!) an A/R sensor. This will then show you if your running rich or lean. Once you've got the bike to perfection add 4 lambada sensors in the down pipes and start rejetting again. Every clinder is different. 4 in a line will usually mean the two inside cylinders are running lean(er). It's takes patience. Do you need a dyno to test? Hell no. Instal an app that measures accelation by speed. And keep adjusting until you're happy!
6. Don't ever forget to check your carb fuel hight. Too high and you'll flood at low throttle. Too low and you'll run lean. The higher the float level measurement (ie 15mm) the lower the fuel level. The lower the float level measurement (ie 10mm) the higher the carb bowl fuel level.
7. Check your carb syncronisation!!! This is crucial! Make sure no springs are missing!
8. Once you get it right start thinking about your rear tyre traction. Your street fighter will be so fast that your rear shoe will slip. Don't forget that if you give full throttle and let the clutch out your bike will (believe me!) go vertical and you horazontal in an ambulance.
9. Once your tuned to about 0-60 in about a second start worring about cars hitting you that turn on to the road. They don't expect you to reach them so fast!
10. Don't get yourself killed!