For those that did make it, thank you. I think we all had rather a good day. As soon as Im back at work I will email Andy the graphs and they can be put up on the site.
The ride out, I think was brilliant. We all went out and we all came back. While at some stages it got alittle "frantic" it was great fun and well worth it. I hope Dave and Fontyyy agree.
Maybe today Dave can post some of the pictures that he took of all the NSR's at the end of the day? _________________ If I have to take the carbs off once more...
Those NSR's look lovely! sorry I couldn't make it guys, the TDR isn't fixed yet and it only managed a few miles before I gave up trying to get to Plymouth...useless Yamaha's eh?
I had a top day! The roads were mostly fantastic, despite the thousands of cars who turned up to spoil the fun. Weather couldn't have been better. We did about 140 miles I think, and got I through 2 pasties, a baguette, and £13 of fuel. A bargain!
I even got to ride a few other peoples bikes:
Fonty's 28 pulls really well, hadles superbly, and feels like a well sorted NSR - though with no airbox lid is a little loud for my tastes!
Stephens 18 is also very well sorted. Feels tall as it's raised at the back, and does feel a little older to ride than the 28, though the brakes and engine are top notch. Sound is spot on too.
Monkey's R that I rode most of the time is one helluva good bike. It is standard, so was obviously hard work to keep in touch with the tuned guys, but if you rode this bike in isolation you'd be delighted with it. It looks fab, and whoever buys it is getting a steal. Open up that airbox, jet to suit and you've a stunner on yer hands!
Billies racebike is... wierd. He's got a ram air system on it, and bar grips that are slowly disintegrating, so he leaves grubby rubber hand prints every where. Aside from that it sounds great and is bleedin quick - mind you, he only weighs the same as my head, so it's no suprise he's quick.
All in all a shame there weren't more attendees, but on the other hand, 5 was a perfect number for a mostly controlled ride out!
_________________ MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball
Oh, it's happened already has it. Sorry I (and the ns400/aprilia project bike ) missed it. The now repaired (had broken pv) aprilia rs300 would have looked better on the dyno than before though it was only fair to keep the rgv away to give you boys a fair chance this time Glad the weather was more favorable than last time for you to enjoy those twisty west country roads.
Sorry you missed it Dave, and sorry about your 300. We have almost sorted my 300 and the last run I was did it was making 74bhp complete with stock carbs. So thats almost ironed out now.
Im running mine as a 250 though right now as I managed to pick up some MC18 HRC F3 barrels and after huge exspence manged to have them saved and replated.
I had another guy in this very week with a 'prillia 300 who had dropped a PV and has now "blanked" them, we will have to see how that goes as hes still using the stock carbs too, but fully open to air. _________________ If I have to take the carbs off once more...
Glad the 300 is sorted and 74 reliable bhp is superb. The nsr 150 barrells look a far better way of getting the capacity (apart from that strangely shaped restrictive looking exhaust 'header' easilly cured) than what has to be done to the standard rgv250 barrells and of course you have the 54mm stroke to start with so you don't end up massively oversquare. I'm using reed block spacers (to reduce crancase compresion) on the rs300 but have not got any back to back dyno results yet to prove that it works, food for thought though.
With the reed block spacers fitted have you noticed a improvement? I would of though with the inlet track being longer now you would of picked up some bottom/mindrange too. _________________ If I have to take the carbs off once more...
There is a massive improvement everywhere but I did the job at the same time as getting some bigger chambers on and mending the pv (that was broken and stuck in closed position) also it's only now I have the 38mm mikuni's on without the pv broken so who knows really without just swapping that one thing over and doing back to back runs (something hard to find the time/money for). With the rgv the reeds open very close to the pistons and this is worse on the 300 overbore. In fact on the top cylinder the reed stops partially block the boost port due to things being very tight (though this is simple to cure). The rgv is known to have low crank volume and my thinking is that the 300 makes this worse and that having the extra volume near to the transfers is a good way of reducing crankcase compression. I do feel I have some scope now to reduce the combustion chamber volume slightly to get back to an optimun final compression ratio (for pump fuel) but I don't know by how much and as the Stan Stephens 300 conversion already uses oring head I can't play around with head gasket thicknesses though I have a few spare heads!!!
IMHO the nsr looks a better bet for 300cc than the rgv (notwithstanding reliability issues) and if I was looking to get a 250 stroker with 300cc in mind then the nsr150 barrells make the nsr the better starting point, but that's not how we actually do things anyway is it. I can't see my overbored rgv motor ever making 74bhp though 70 might be on the cards one day. Hindsight is a wonderful thing but what counts is what we learn and the fun we have along the way.
glad you had a good time boys.
nice write up on the bike Dave glad you had a good spin and kept it rubber side down, did it get a spin on the dyno , to tell you the truth i havent even seen the bike since it got back, fontyyy dropped it back on tuesday evening but i have been laid up in bed with a trapped nerve in my back since monday this is the first time i have really been able to move, i have only been sat here for 10 mins and i am already grimacing still off for physio tomorrow with any luck.
maybe i'll get to se it later.
big thanks to Andy for all his hard work and time he has spent on the bike i am sure that "rebuilt by NSR-world.com" will be a major selling point. _________________ MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold
No time to get it on the dyno mate the Fontyyy butt dyno (which is no where near as accurate as Steve verni-eye or Andy's torque wrist) would put it around the low 50's. It feels considerably faster than my CBR did before it was set up and that had an earth crushing 46bhp, not that different to the RVF and it would kill my '28 if I ran it on the normal card.
The original plan was to have a play with hole config on a blank airbox lid Andy had got made up but we spent most of the day trying to give his '21 a little midrange and cursing how hard my '28 needles are to get at
I am of the opinion that form follows function, so make an NSR work properly and it will look and sound proper and so was personally massively dissapointed that putting an airbox back on didn't fix it's problems as it would have been amusing to watch the dilemma, posey pod filters or a bike that works. _________________ Please do not PM me technical questions, if you can't find it on the Forum start a thread
Interesting read, those NSRs look fantastic! What's it like riding these sort of bikes in a group - presumably rider skill is more apparent on bikes like this than the 4 strokes that I'm used to (which I seem to be able to get away with murder/show up much larger machinery on). Or does the owner's list of spec parts really come into the equation?
I've only seen 1 NSR250 before (from a distance, the owner was mobbed at Box Hill) let alone seeing 4!
craigs23 wrote:
I've only seen 1 NSR250 before (from a distance, the owner was mobbed at Box Hill) let alone seeing 4!
It was actually 5, Craig!
The NSR, as with any of the 250's, is really down to what you can do with it! Dave Ett did a rather commendable job on the day with Monkey's stock "R" model considering it was probably a good 15-20hp down on all the other bikes.
Of course, a few mod's to delimit an MC21 goes a long way to making for a lot more of an entertaining ride, but the NSR is all about the brakes and handling. The road that we used for the ride-out was predominently 35-50mph corners with a few faster ones thrown in for good measure. StephenRC45 and I did the same road a few months ago on my MC21 and his (virtually full HRC spec') RC45 and I'm sure I had just as much fun, if not more, pushing the NSR to its' (rather my) limit - but you really have to ride 'em!! _________________ Andy.
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