Legalities of copying parts

[GMC]

I had a phone call once from an angry Bengt Aberg complaining that I had copied his frame.






Turned out to be my mate Dave

[tony27]

i reckon if you have the skills there is good money to be made for Honda clutch cases 125,250 & 500 from around 1982 - 1990 made in aluminium as the OEM magnesium case  corrode the water pump out.

put me down for 1 only 1986 CR250RG  & 1 only 1985 CR500RF

My boss was approached earlier this year about making the covers but I don't think the numbers stacked up for it to be viable in the amounts asked about, were there a few different types of covers over the years?

[Hoony]

i don't know the exact models that are same but i would say 125, 250 & 500 all differ with each era!

I know 1985 & 86 500 are the same, possibly 1987 -1989 same and possibly onwards from there

1986 & 1987 should be same except for clutch access cover (its on the 87 but not the 86). i have a microfiche here so if you think it may be a goer i can research it.

3 guys on this forum alone would like 85' CR500 covers !

[Mike52]

Saw a 85 CR on Marks with a aluminium clutch cover so some one must be making them.

[evo550]

i don't know the exact models that are same but i would say 125, 250 & 500 all differ with each era!

I know 1985 & 86 500 are the same, possibly 1987 -1989 same and possibly onwards from there

1986 & 1987 should be same except for clutch access cover (its on the 87 but not the 86). i have a microfiche here so if you think it may be a goer i can research it.

3 guys on this forum alone would like 85' CR500 covers !

Hoony,

I am lead to believe that the '93 onwards CR 500 covers fit the earlier ones, these are still avaliable from Honda at about $300 and are made from alloy.
They have a different part number to earlier covers due to Honda adding another clutch plate in '93 so the width is increaced slightly and require about 50ml more oil.
They also have slightly different plumbing angles, but this should be easily overcome.