Ypvs and nsr250

[veg]

Just a thought anyone ever done this as a conversion? Obviously a pv motor into an nsr chassis?

[midlifecrisisrd]

No but an nsr weighs feck all

Was surprised even in restricted form how nippy it was

Steve

[veg]

Exactly and never seen a conversion wondered if it’s because it’s physically unable to accommodate the engine?

[Tobyjugs]

The YPVS engine is very long so it will be a big task.

[veg]

Thanks Tony I guessed there had to be a reason and with the nsr being a physically small motor and compact.

[midlifecrisisrd]

NSR motor is compact but as the front cylinder goes forward I don't think length would be the problem

I'd be more worried the frame isn't wide enough between the spars

Steve

[midlifecrisisrd]

In saying that I've just found this pic of the mc28sp I was working on and although frame looks wide the engine is tiny

Steve

[veg]

Be interested to see whether it’s possible.

[Tobyjugs]

Don't forget that Pedro had done the same with a 3xv. It is possible, takes a lot of head scratching and compromise.
Nico Bakker showed me a chassis he was building after a German customer had seen my build thread and asked to put in a RD500 engine in it. Nico said it was much easier to do because the front exhausts are much more angled downwards making mote space for radiator and front wheel travel.

[LC_BOTT]

I'm sure there was one in practical sportsbikes a while ago, built by Martin77??. Think it's also on the NSR forum

Found the thread on the NSR forum, but no pics etc, there is also a very short vid on youtube. and found a oic of it mounted in the frame. Search for NSR 350

Not sure this will work,

hosting.photobucket.com/albums/oo127/martin1877jan/PV4.jpg

[Deleted]

Martin77 (Johnson) has one. He did all the work himself.

The 2 front engine mounting brackets are part of the frame so these need to be removed just below the headstock, otherwise the YPVS wouldn't fit.

[donkeychomp]

Do you have an NSR rolling chassis Tim? Because if not it seems like a hell of a faff to me. Would it be any faster and how would the handling be affected?

Alex

[veg]

I don’t Alex I was just looking at nsr and wondered why hadn’t seen one. I am hoping to get my arse in gear to buy another chassis shortly just need to speak to the seller all my fault I’m busy when I’m
Not I don’t want to disturb him. Hoping this weekend.

[Stef]

It looks like it might be do-able.
I bought a cheap rolling chassis that had been cut about to take a kx500 motor. It was for sale locally on fb, I'd always liked the wheels and swingarm on these and was already thinking of putting them into a yam based ypvs project.
Then I thought I wonder if a ypvs engine would fit in there, it's already been cut about so I'm not hacking about a 'good' nsr frame?
It doesn't look too far away from initial motor dangling.

[veg]

Me likey, be very interested to see this, I’ve always loved the look of the nsr and if you could do a big bore you’d almost have the twin cylinder works nsr500 down to a tee.
Wasn’t it Dave that built a pv engined KR1 with over 100 bhp?