Classic Kawasaki middleweights of the 80’s

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With the significance of the 250cc class diminished by the change in the learner class to 125cc. Kawasaki hedged their bets in 1983 and launched the GPz305 to sit alongside its smaller sister the Z250T.

Kawasaki made a bid to take the bike out of the lightweight class and identify it with the GPz sports range without any significant insurance premium penalty.

At £1249 the 305 was £150 more expensive than its 250T sibling but boasted 9HP more than the twin shock A3 model (which was still listed in 1983) gained by boring out the engine to its larger capacity. Although the figures quote only 3BHP more than the 250T model, torque was the main improvement. Tests show the GPz305 as the first of the family to top 100MPH (prone). Twin discs up front added little to the overall weight at 324lb ( 8lb up on the Z250T )

To download the full road test and specification for the Z250T from Mechanics Magazine June 1983 as a PDF please click here

GPz305 specs. As they appeared in the 1988 Range brochure

To view the whole 1988 Kawasaki range, click on the cover above and download the brochure as a PDF

Z305GP or EX305-A1 sales brochure confusing model designations!

Some really useful info for GPZ305 owners can be found at…


In 2006 Classic Motorcycle Mechanics did a great review of the GPZ305.

Read it in full as a PDF here.

With thanks to  Classic Motorcycle Mechanics website here

These Ads from 1983 & 1984 show the Gpz305 slotted into the whole Gpz range