XS650: TZ250N   Leave a comment

  • Early 80’s
  • GP World Championship
  • TZ250 rulz

Until Honda rolled out the RS250, ’85

 

1 .. TZ250H

TZ250H

 

  • 1981
  • TZ250H
  • Mechanically-governed 500cc powervalves. Closed to 8,750 rpm. Fully opened 11,000 rpm. Reliable power
  • Crankcase was split left and right
  • Run backwards
  • Tapped from the center
  • Lower piston speed. More reliable bottom ends
  • Free flowing exhaust gases
  • Mikuni ZC carbs
  • New frame. 6.5 pounds lighter
  • Engine a little more forward
  • Improved rear shock
  • Reduced rake improving the ride
  • Wire wheels on offer

Expensive

Pushed Kawasaki’s KR250

 

2 .. 85 ... TZ250N

85 … TZ250N

 

  • 85
  • TZ250N
  • Reeds too small and heavy
  • Flawed cylinder redesign
  • Bit of a pig
  • Exhaust, Carb kits, A bit of suspension fiddling. None covered poor engine performance

85. Honda’s 70HP RS250. Twin-spar aluminum frame. Rubbed Yamaha’s nose in it

In the 90’s.  YZR/TZ 250. Yamaha had a little success …

 

3 .. keeping the price right ... and Dotti ... bet she's still doing her thing there at Yamaha Ca

keeping the price right … and Dotti … bet she’s still doing her thing there at Yamaha Ca

Posted March 15, 2012 by xscafe in Forums, Frame - Design, General, Tools, XS Pics

Tagged with

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: