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Hello and help!?!


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stox

 
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Joined: 03 Apr 2006
Location: Leighton Buzzard
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Hello and help!?!

Sun Apr 12, 2009 7:40 am » Post: #1 » Download Post

Hi all, been a long time lurker, thought it was time to start posting.
Ive been around bikes for years - from RGVs to Fireblades.

Im off to view an MC21 today, just like to know if there are any specifics to look at? When should the top end be rebuilt etc?

Any help would be appreciated.
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paul g
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1991 Honda nsr 250 mc21 sp
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Sun Apr 12, 2009 9:23 am » Post: #2 » Download Post

Make sure the powervalves work! If not cleaned they seize up, burn out the p/v servo and then burn out the pgm unit.
Take the r/h quick release fairing panel off, the pulleys on the side of the barrell should open and close at about 2-3000 rpm. You should be able to rotate them by hand as well, 2nd hand pgm's generally sell fo £100 to £150 when they OCCASIONALLY come up for sale.
Cold starting issues tend to mean the crank seals are shot.
The pistons last a good few thousand miles, I just changed mine at about 6000 miles recently and the pistons were just out of limit. If the seller cant tell you when the top end was last done try and bid him down the cost of a rebuild (£170 from Jap 4 performance).
You havent stated wether its an R, SE or SP? I guess you have read the model history on this sight, SP's are obviously the most sort after and should have adjustable forks, remote reservoir suspension, dry clutch and magteks (smooth rim with no lip, magtek on the spokes)
Good original bodywork is as rare as rocking horse sh*t and in my opinion is well worth paying extra for, but it depends what you intend to do with the bike.
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Andy
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1991 Honda NSR250 MC21
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Sun Apr 12, 2009 11:56 am » Post: #3 » Download Post

Perfect answer Paul... I only wish I could be so helpful! Smile

Welcome to the Forum stox.
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stox

 
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Sun Apr 12, 2009 3:44 pm » Post: #4 » Download Post

Thanks Paul.
Well im now the proud owner of a fairly modified (Tyga) MC21.
I'll get some photos up in the garage after ive picked it up.

The summer has just got better!!!
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