1987 Honda CBX 250 valve clearance specs - 1987 Honda CBX 250

If you mean a workshop manual? you could go to the "Haynes" website and order it from there.

Your valves are adjusted backwards. Most Honda's will use: IN = 0.10 mm ( 0.004 in ) and EX 0.12 mm ( 0.005 in ) A simple adjustment should take care of the problem.

http://www.drumhillcycle.com/
http://cyclesrus.net/
try these sites, good hunting.

the best all around weight is any major brand 10W40W

First off, check and adjust the valve tappet clearances. Under normal use, the valve tappet clearance tends to decrease. With this comes lost compression and a poor idle.

Next, check the air filter (clean as needed or replace), and drain any water or other sediment from the carburetor float bowl.

If you have a couple bucks to join the Honda Riders Club, they will give you access to the Honda Service Manual for your motorcycle according to information posted at the web site. http://hrca.honda.com/

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a

try clymer manual off ebay _ £20 ish) truley a bible in the biking world

SAE 10-40 motorcycle oil.
Your bike requires 1.25 litres of oil.