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Suzuki
GSX750F Katana, 98-06
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Suzuki
GSX750F Katana, 98-06
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Carb Recalibration Kit, Jet kit, jetting kit |
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 CRB-S14-1.0 $129.95 |
The kit, when properly tuned, adds more low-end / midrange and if the proper main jet is selected, more top-end power. Easy to install and tune - no slide drilling required. |
 CRB-S14-3.0 |
Sorry - the 98 and later 750
Kat is one of the few early bikes that doesn't like the airbox
removed - It creates lean spot from 4k to 5k and a rich hump at 7k
that can't be fixed with any carb changes -
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As of May, 2008, Factory Pro doesn't make replacement needle jets, but they are available through Suzuki |
Long Boy Fuel Screw pn: CRZ-SCR-4030-M $59.95 |
"Long Boy" Frustrated with trying to find an "almost 90 degree" screwdriver
to fine adjust your fuel screws for best idle and cruise? Make your life easier! Installation: gsx750 screw assembly comes with:
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 RTR-SUZ-2 $54.95 |
This simple, bolt-on advance
kit advances the timing. With stock engines with stock compression ratios,
there is more power everywhere. Part throttle power is better - helping
corner exit speeds. Improved in-town drivability and quicker warm-up.
REQUIRES an AIR IMPACT wrench to install. |
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Spark Plugs, Denso ~$3.00 |
X27ETR - Standard replacement plug from the largest supplier of electronic components to the MC industry in the world. |
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Denso (ND, Nippon Denso) is the largest
OEM supplier for autos and motorcycles of electrical components in the
world. Sometimes, people forget that Denso makes pretty darn good spark
plugs, too! Wide heat range properties discourage plug fouling at low
speed AND overheating at high speed. We have been using Denso spark plugs in our AMA Supersport bikes since Denso was Nippon Denso and ND. We have found that some standard, <$10, off the shelf, Denso spark plugs work as well as $125 special spark plugs - on a professional roadrace level! Codes: X = 12mm thread w/ 18mm hex 27 = Heat range. (Hint - it is ~3x NGK #. I.E. an "9" heat range in NGK) E = 3/4" reach P = Projected tip type plug or T = Dual ground electrodes R = Resister type internal construction Z = Thin platinum center electrode w/ tapered ground (side) electrode U = "U Groove" side electrode for better spark and finally.. 9 = is "pregapped" at .9mm (You should check any "pregapped" plug before you install it..) |
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SHFT-SUZ-3 $39.95 |
Trans Detent Spring
Kit Make shifting MUCH quicker and virtually eliminate missed shifts. This is the kit that puts "snap' back into the trusty Kat! |
TL-float height gauge $49.95 |
The only way to accurately measure float heights. Works on nearly every carburetor. |
| Mikuni / Hitachi / Keihin "Emulsion" Tubes | |
This is enough wear to cause problems. |
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| Top Left
side - This is a picture of the needle jet
area of an emulsion tube from a stock 38mm
CV Mikuni carb as installed on Ducati, Yamaha TDM/TRX 850, YZF750,
FZR1000, etc.. It has approximately ~5000 miles or 8000k usage on a Ducati or TDM 850 - WITH A STOCK Aluminum NEEDLE. Notice that the center hole is noticeably worn at the "V", the 12 o'clock position, which would be towards the engine, as installed in the carburetor. This causes 2 conditions. First, it allows more fuel to enter the carburetor, as in using a needle with a small base diameter AND the fuel that enters the carb - it enters in larger droplets, resulting in poor combustion. We carefully check needle jet condition on the vehicles when we create and install carb recalibration kits. If you install a kit and it is much too rich at low rpm, and lowering the fuel level 1mm doesn't fix it, check the needle jets for any wear - it's not uncommon. Additional: Eventually, in the 36mm horizontal mount and 38mm downdraft Mik's, the carb body plastic insert, where it holds and guides the slide from rattling back and forth, will wear out - allowing the slide to rattle and bang the needle fore and aft in the needle jet orifice - causing accelerated NJ wear. This wear is biased towards the lowered slide position - as in idle and low rpm areas - as in "in-town", "stop and go" driving. The gist of that is that you may only get 5,000 miles out of your needle jets in your VL / VS bike that you use for cruising 4th Street and hanging out at McDonalds - but your long distance , highway cruising buddy might get 25,000 miles before mileage deteriorates to 25mpg or worse. I haven't heard of anybody who has got the "60,000 miles" that some Tech Bulletin claims is normal with a stock needle...... I WILL change this if I ever find that person who made it to 60,000 miles on his/her VS / VL and has the original needle jets/emulsion tubes. In fact - I'll GIVE any carb needle jet rebuild to any VL 1500 owner who makes it to 60,000 miles on the original needle jets! Marc Slide Guide Wear: Example: The original needle jet lasted 5,000 miles in your usage. After replacing the worn emulsion tube / needle jet, they only lasted 3,000 miles or less. That's because the slide guide slot in the carb body is worn - not because of the emulsion tube or needle is bad. Even Suzuki knows that - even though their highly optimistic estimate of 60,000 mile life with a stock needle is based on perhaps a VL1500 or VS1400 run at high speed on a highway.
A "step" inside of the needle seat in
the carb slide? Be famous! (for something besides
"that"!) |
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Looking for your idle mixture screws? Here is where they are located: |
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Articles
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Factory Pro Fall Special! Book a sightseeing
flight over the Wine Country or a Kamikaze aerobatic flight or a biplane
flight over Infineon Raceway, the Golden Gate Bridge and the San
Francisco Bay for one or two during the months
of October and November and get a free souvenir t shirt! 707 938 2444 |
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The extension of the laboratory for engines of the
Swiss Federal Institute of Technology was completed in about 1935.
Its architect was Rudolf Otto Salvisberg (1882-1940). He had a
successful career in Berlin but returned to Switzerland after the
advent of the Nazis. His architectural style was somewhat similar to
that of Erich Mendelsohn. The staircase of the laboratory is in
normal use but well preserved. Edited to the tunes of Chemical Residue by Herbie Hancock. |
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Maybe in next rewrite, he'll fix the ignition timing and dyno chapters... Otherwise great book with great starting ideas. |
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My bible |
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The little blue bible for quick references and little known facts. |
