LATEST RACING NEWS   THOUGHTS and OPINIONS   ARTICLES and STUFF
RACING FRIENDS   RACE TRACKS   ITEMS FOR SALE   PARTS WANTED
MY TZ250   MY R5 350   MY TZR250   THE OW600 PROJECT   50cc BIKES   MY SRX600   MY RZ500

race weekend packing listtrackday packing list

Get yourself organized for the track with these two checklists.

tire and rim sizes

Here is a chart for figuring out the proper tire sizes for your rims.

brake master ratios two piston calipersbrake master ratios four piston calipers

These charts are for selecting the correct brake master for your calipers.

cycle sport page 1cycle sport page 2cycle sport page 3cycle sport page 4

An interesting article on how to make a TZ beater out of your RD400. Yea, right.....

tz250 gearing chart

A simple chart to pick the proper sprockets for early TZ250s (73-80).

tzr250 mods page 1tzr250 mods page 2

A detailed article on a modified TZR250 from way back in 1988.

yamaha rim codes

A list of yamaha rims from the 80's and their casting codes for identification.

lectron brochure page 1lectron brochure page 2lectron brochure page 3lectron brochure page 4

Vintage promotional flyer for Lectron carburetors.

daytona YSR50 brochure page 1daytona YSR50 brochure page 2daytona YSR50 brochure page 3

Original Daytona brochure for Yamaha YSR50 hop up parts.

VP fuel application chart

The VP fuel application chart.

tsi page 1tsi page 2tsi page 3tsi page 4

tsi page 5tsi page 6tsi page 7tsi page 8

Yamaha's tuning specifications for the RZ500.

Expansion pipe design program

A really good two stroke expansion pipe design program.

tzr250 factory service manualtzr250 F-III manual

Links to the 1987 TZR250 service manual and the F-III tuning manual.


LATEST RACING NEWS   THOUGHTS and OPINIONS   ARTICLES and STUFF
RACING FRIENDS   RACE TRACKS   ITEMS FOR SALE   PARTS WANTED
MY TZ250   MY R5 350   MY TZR250   THE OW600 PROJECT   50cc BIKES   MY SRX600   MY RZ500

CONTACT ME AT TIMOTHY@NAUGHTYBOYMOTORRACING.COM