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Classic Bike Trackdays

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  Topic: MVX 250 crankshaft wanted for racebike
kiwi mvx

Replies: 0
Views: 15789

PostForum: Honda   Posted: Sat May 16, 2020 8:28 am   Subject: MVX 250 crankshaft wanted for racebike
Hi Guys,

I'm probably asking the impossible however I am building up a second mvx for track use/ racing only and really need a replacement crankshaft for either spare parts or to rebuild. Open to a ...
  Topic: MVX 250 jetting
kiwi mvx

Replies: 3
Views: 7627

PostForum: Honda   Posted: Sat Dec 05, 2015 7:59 pm   Subject: Seized after 10000 km
Hi Guys,
Well after approx 10 000km of what I would say hard riding the MVX finally seized after my initial rebuild. I had been progressively leaned out the jetting to 128 mains down from 130 mains ...
  Topic: Possible NSR250 mc18 owner
kiwi mvx

Replies: 13
Views: 15789

PostForum: Honda   Posted: Thu Aug 15, 2013 6:46 am   Subject: Possible NSR250 mc18 owner
Just to clarify my statement about MC 18 cranks. Yes they can be rebuilt however the problem is the crank pins that the conrods connect too start to wear and due to the crank pin being an integral par ...
  Topic: MVX 250 jetting
kiwi mvx

Replies: 3
Views: 7627

PostForum: Honda   Posted: Tue Aug 13, 2013 7:10 am   Subject: MVX 250 jetting
Thanks Ian, it's good to know 125 is the standard main jet, perhaps the sets of carbs I have pulled apart were re jetted by previous owners in an effort to prevent engine seizures?
Interesting your b ...
  Topic: Possible NSR250 mc18 owner
kiwi mvx

Replies: 13
Views: 15789

PostForum: Honda   Posted: Sun Aug 11, 2013 8:43 am   Subject: Possible NSR250 mc18 owner
Hi there, in addition to the MVX I also have a 1989 NSR 250 MC 18 R5K. This model was sold new in New Zealand for approx $ 10, 000 to race in the super competitive 250 production racing class. They i ...
  Topic: MVX 250 jetting
kiwi mvx

Replies: 3
Views: 7627

PostForum: Honda   Posted: Sat Aug 03, 2013 10:09 pm   Subject: MVX 250 jetting
Hi Guys, I have done approximately 8500 km on my engine since I rebuilt it with no dramas and a lot of that riding has been open road stuff pushing it along pretty hard so I guess by MVX standards it ...
  Topic: MVX250F Motor reputation (and possible remedies requested)
kiwi mvx

Replies: 15
Views: 20821

PostForum: Honda   Posted: Sat May 21, 2011 10:19 am   Subject: MVX250F Motor reputation (and possible remedies requested)
Hi everyone,
Just to add my two cents worth to the topic of reliability, I put these comments on the Wikipedia page :

"In 1984 the MVX 250 was sold new for $3299 New Zealand dollars.
Initia ...
  Topic: MVX 250 on Wikipedia
kiwi mvx

Replies: 1
Views: 3749

PostForum: Honda   Posted: Sat Aug 28, 2010 8:44 pm   Subject: MVX 250 on Wikipedia
I thought the planet would be a better place if this information was availiable to the masses. Feel free to contribute as you see necessary.

http://en.wikipedia.org/wiki/Honda_MVX250F
  Topic: MVX250
kiwi mvx

Replies: 11
Views: 14294

PostForum: Honda   Posted: Wed Jun 17, 2009 9:29 am   Subject: MVX250
Thats good gear if ever I have seen it, how many km's on the speedo?
The only obvious difference between the your model and the model we received down in NZ is all our mvx's all had flush mounted fr ...
  Topic: MVX 250 crankshaft enquiry
kiwi mvx

Replies: 7
Views: 10364

PostForum: Honda   Posted: Sat Jan 10, 2009 12:40 am   Subject: MVX update
After searching the globe for crankseals, I did find the original manufacturer based in the USA who was prepared to make a limited run of crankseals. the dimensions quoted were 52 mm x 36mm x 6mm Nitr ...
  Topic: MVX 250 crankshaft enquiry
kiwi mvx

Replies: 7
Views: 10364

PostForum: Honda   Posted: Mon Jun 16, 2008 8:48 am   Subject: MVX 250 crankshaft enquiry
Hi Guys,
greetings from the southern hemisphere. Iv'e just found this fantastic website, what a revelation!. It can be a dark and lonely road you head down when you choose to ressurect a mvx.

I a ...
 
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