Hey guys, I'm looking at a 91 FZRR and I've been told it's normal to idle at 3500rpm. I wanna confirm this with others, I had a look at FZRR forum and couldn't find any info but they share same service manual as fzr400 apparently and thy idle at 1600rpm. Mechanically I know it only had a roo racing exhaust ad the only mod and surely it wooing change idle by anything at all. 91 LN3L Thanks
Hey James I like the FZR250, I have been looking for a decent one to buy for a while now, but they seem to hold their value quite well. I have seen the tacho and yes it starts at 3k, however I belive the correct idle is 1500 - 1600 rpm according to a friend of mine. As for your question about how to set it to 1500 rpm, you can use a multimeter that can measure hertz (cycles) , probably best to google it as its quite hard to explain and I havnt done since 1992 on my first car, the might 1.6l Ford Escort 8) If you do use a multimeter, dont forget to times it by 60 as its measures cycles per second ie 25 cycles x 60 = 1500 RPM Are you giving up on the Across ? Chris
If it were 1600rpm, how would you know what the rpm is at on idle if tacho starts at 3k.. If the tacho started at 3000rpm it would make sense to be 3500rpm.. I haven't entirely given up on the across yet, my final fix is the new carbys and if there is no improvement i'll be so frustrated that i'd turn my attention to another bike, but then again all bikes of same price range run carburetors too.
Definately 1600 RPM idle, see specs below Chris FZR250 Specs 3LN Yamaha FZR250r EXUP Model name; FZR250R Model Code; 3LN Engine Start Number; 1HX Frame Start Number; 3LN-350101 Overall Length; 1990mm Overall Width; 685mm Overall Height; 1100mm Seat Height; 735mm Wheelbase; 1375mm Minimum Ground Clearance; 140mm Dry Weight; 146kg With oil and full tank; 166kg Fuel consumption; 51km per liter at 50km/h Climbing Ability 27 degrees Minimum turning radius; 3000mm Engine type; Liquid cooled 4-stroke, DOHC Cylinder Arraignment; Forward inclined parallel 4-cylinder Displacement; 249cm3 Bore*Stroke; 48.0*34.5mm Compression ratio; 12:1 Compression pressure(STD); 981kpa/400rpm Max house power; 29.4kw at 14000rpm Max torque; 25.5nm at 10000rpm Starting system; Electric Starter Oil type or grade engine oil; SAE20w40se or SAE10w30se Periodic oil change; 2ltrs With oil filter replacement; 2.2ltrs Total amount 2.7ltrs Air Filter; dry type element Fuel type; Regular Gasoline Fuel tank cap; 14ltrs Fuel reserve amount; 2.8ltrs Carburetor type; BDST28/4 Manufacturer; Mikuni Sparkplug;NGK, CR8E Sparkplug gap; 0.7mm~0.8mm Transmission Primary reduction system; Spur gear Primary Reduction Ratio; 89/35 (2.542) Secondary reduction system; Chain Drive Secondary reduction ratio; 56/17 (3.294) Clutch type; Wet, Multiple-disc Transmission type; Constant Mesh 6-speed Gear ratio 1st; 34/11 (3.090) Gear ratio 2nd; 31/14 (2.214) Gear ratio 3rd; 32/18 (1.777) Gear ratio 4th; 27/18 (1.500) Gear ratio 5th; 25/19 (1.315) Gear ratio 6th; 27/23 (1.173) Chassis Caster Angle; 24.5degrees Trail; 87mm Tire size (front); 100/80-17 (Rear); 130/70-17 Wheel travel (front); 130mm (Rear); 117mm Carburetor Pilot screw; 3 turns from right in Idle speed; 1600rpm Intake Vacuum; 18.7kpa Front suspension Fork travel; 130mm Spring rate; 7.8n/mm oil capacity; 390cm3 oil level; 106mm oil grade; 10w fork oil Rear suspension Absorber travel; 50mm spring free length; 173mm Drive chain Type; 428vs/Daido No. of links; 130 Chain freeplay 20~30mm Brake fluid type DOT No.4 If you have a 2kr (pre-delta box, with exup) all of the above is essentially the same except for: Model name; FZR250 Model Code; 2kr Frame Start Number; 2kr-??? Dry Weight; 142kg With oil and full tank; 162kg Tire size (Rear); 120/80-17
