NSR250.net Forums Logo: Honda NSR 250 Forums, Classifieds and Service Manual in English. Covering All Honda NSR 250 MC16, MC18, MC21 and MC28 models
NSR250.net Forums

#
 
#
 
Performance Engineering

  • NSR250 Forums Index ‹ NSR250R Discussion
  • Members Content
  • Members Garage
  • Subscription
  • Transactions
  • FAQ
  • Search
  • Register
  • Log in

Cadwell F250...


Reply to topic   printer-friendly view
Page 1 of 3  Goto page 1, 2, 3  Next Download Topic





Andy
Site Admin
 
Posts: 11950
Joined: 19 Jan 2004

Location: Devon, UK
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Cadwell F250...

Tue Sep 21, 2010 6:12 pm » Post: #1 » Download Post

Come on then Roy, spill the beans! Wink
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


Check us out on Facebook! Please "like" our page!
Back to top


fontyyy

 
Posts: 3509
Joined: 10 Apr 2004

Location: Derbyshire, England
1991 Honda NSR250 MC21
    Send private message View user's profile Visit poster's website MSN Messenger
    Reply with quote  

Wed Sep 22, 2010 3:01 pm » Post: #2 » Download Post

Roy won an F250 race and got a 3rd in F400, in the wet (everyone else on wets) running intermediate tyres.

I threw it down the track in practice (lowside, Charlies 1, presumably a slighty cool tyre) but made it out again for the races. Dan still had problems off the line and a misfire developed in Sunday race one, he left after that.
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread


Last edited by fontyyy on Wed Sep 22, 2010 7:49 pm; edited 1 time in total
Back to top


RichG

 
Posts: 1128
Joined: 11 Feb 2008

Location: Leeds, UK
1992 Honda NSR250 MC21
    Send private message View user's profile Visit poster's website
    Reply with quote  

Wed Sep 22, 2010 4:23 pm » Post: #3 » Download Post

Great riding Roy, sounds like its all coming back quickly after your mini 'lay-off'!!
_________________
Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30
Back to top


Chester362
Supporter - Titanium
Supporter - Titanium
 
Posts: 940
Joined: 19 Jun 2005

Location: Cheshire, U.K.
    Send private message View user's profile
    Reply with quote  

Wed Sep 22, 2010 10:17 pm » Post: #4 » Download Post

Sorry lads, dragging my heels again, as usual!

I really enjoyed this weekend. Dan, John and myself had a little NSR corner in the paddock.
Meeting Lain McDonald and Dave Reynolds in the bar on Saturday night was a good laugh too.

As usual I ran out of time and didn`t have the wet bike ready again. So went with the dry bike and spare wheels. Thought I`d buy a set of wet tyres at the circuit. Didn't count on them not having a 160 rear.......... Oh well, I've already been slated by my mate for not being professional enough this year! Must try harder next year.

So, no wets for me!

Saturday I spent getting used to the track again. I was riding a bit like a cissy to begin with. Had a bit of trouble with the generator so didn't get the chance to use my new tyre warmers. Yes, I finally got some!
First race, grid 13, finished 13th. 3rd 250 behind Dan and Lain, 2nd & 1st respectively.
Second race was much better, finally got the warmers on. I wasn't convinced they'd be any good. Boy was I wrong! The bike felt funny on the grid, I`d never experienced squidgy tyres at the start before!
Anyway, it had rained just before the race. luckily I didn't have the option of wets as it dried up quickly. I got a pretty good start and started to feel more comfortable. I was two places behind Lain and I think I could've caught and passed him. Then the gear lever cracked and bent up. I was going to nurse it home but the race got stopped for a crash. I was hoping they'd call it a result so I'd get a good grid position for Sunday. They did a 5 lap re-run though, which I sat out. So had grid position 16 for first race on Sunday. Rolling Eyes

Sunday was really wet. There was a slight dry line at first then it rained again. I was struggling with slightly wrong gearing too. lost a couple of places due to this. Started 16th, finished 11th. 2nd 250 behind Lain again.
Changed the gearing for the last race. Was much better and I felt more confident too. Started on grid 11. Got a very good start and went for it. Much more aggressive. Was a lot more relaxed and enjoying it more.
Had a lot of lurid slides all over the circuit, was just like old times! Finished 6th, 1st 250, in front of Lain and Dave this time!

Cadwell is my favourite circuit still. I can't wait to get back there again. I know I can get down into the low 1:40's, just need the track time.

John did well to get back out after his crash. I was suprised to see he's just using a road bike at the moment. Shocked

Dan went well considering the problems he was having. He's had some pretty bad luck over the years. He's always upbeat though, don't know how he does it.

I'm looking forward to next year now. Got to get my ass into gear and get organised. Really need to lose at least a stone and a half too! Shocked Sad


Last edited by Chester362 on Thu Sep 23, 2010 4:26 pm; edited 1 time in total
Back to top


StephenRC45
Site Moderator
Site Moderator
 
Posts: 4884
Joined: 28 Jan 2004

Location: Cornwall, England
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 10:24 am » Post: #5 » Download Post

Great going Roy. Glad the bike is performing ok and youre getting back into it.
_________________
If I have to take the carbs off once more...
Back to top


fontyyy

 
Posts: 3509
Joined: 10 Apr 2004

Location: Derbyshire, England
1991 Honda NSR250 MC21
    Send private message View user's profile Visit poster's website MSN Messenger
    Reply with quote  

Thu Sep 23, 2010 3:23 pm » Post: #6 » Download Post

That "just a road bike" used to be OK when people ran stock vj22's, stock KR1s and stock 400's (and I weighed 20kg less Embarassed).
But it appears the 10 or so bikes that have drifted from the grid over the years are the "slow" ones.
2007 (my first season) saw 31 different 250's on the grid (over the season), this year that figure was down to 11 and most of those are pretty hefty spec.

Now it's refreshed it's a little stronger than it was but even after I was sure the bike was OK I did ride in the only dry race (Saturday, race one) like a massive girls blouse and that race was only 4 laps (red flagged and should really have been re-run).
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread
Back to top


NSR-lizard
Supporter - Titanium
Supporter - Titanium
 
Posts: 177
Joined: 13 May 2007

Location: All over!
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 3:51 pm » Post: #7 » Download Post

Nice to see what someone quick with a reliable motor can achieve.
_________________

There`s no cure for stupidity… but with the endless supply of stupid people around me, I must be close to finding it!

The Lizard tells it like it is!

Read - Learn - Post... not - Post - Learn - Edit!

Vampire?

Back to top


Chester362
Supporter - Titanium
Supporter - Titanium
 
Posts: 940
Joined: 19 Jun 2005

Location: Cheshire, U.K.
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 4:10 pm » Post: #8 » Download Post

StephenRC45 wrote:Great going Roy. Glad the bike is performing ok and youre getting back into it.


I have to say big thanks to you Steve.

I haven't even looked at the engine you built three years ago. It's done two trackdays and the last two weekend meetings. You're one of a few people that I would trust to build an engine that I'd race without checking it over. I haven't even changed the jetting since we'd found a safe setting on your dyno.

I think it's also down to me getting a bit lazy, or stupid, or a bit of both!

I did of course fit the straight plug heads I got from Dan. Also got the clutch cover machined for the new seal, but that was all.

I`ll have a go at setting it up a bit better next year, should've dailed out a bit of lag or a slight flat spot 1/4 to mid throttle this last weekend really. Wasn't too bad though. I should be able to get it a bit more crisp.

Andy, I think I'll be bothering you for a set of decals for the bike soon too. I'll have to get some NSR World stickers also, if it's okay to put them on?
Back to top


silikesguiness
Supporter - Titanium
Supporter - Titanium
 
Posts: 2495
Joined: 11 Dec 2007

Location: chesterfield
1991 Honda nsr 250 mc21 sp
    Send private message View user's profile Send e-mail MSN Messenger
    Reply with quote  

Thu Sep 23, 2010 4:30 pm » Post: #9 » Download Post

good stuff roy Very Happy how are you finding getting up to speed?i havnt raced for ages and was wondering if it just comes back to you Confused
_________________
ive seen more tarts than mr kipling
Back to top


Chester362
Supporter - Titanium
Supporter - Titanium
 
Posts: 940
Joined: 19 Jun 2005

Location: Cheshire, U.K.
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 5:04 pm » Post: #10 » Download Post

NSR-lizard wrote:Nice to see what someone quick with a reliable motor can achieve.


Thanks for you comment. Much appreciated.

Unfortunately for me, John and Dan have both achieved a lot more than I ever have in F250.

John's won and defended the Division 2 Championship Title.
Takes a lot of commitment to achieve one championship win, let alone two.

Dan's had more wins and good results than I have too. I think he would've won the title this year if he'd not broken his wrist. (I think it was his wrist)?
Last year he had a monumental start line crash when he ran into the back of a stalled bike on the grid. Engine reliability wasn't his problem last year.

I'm not having a pop at you. Just letting you and everyone else out there know how difficult it is to even get to the races.
Dan's a family man with two toddlers also, as well as the missus, mortgage, work, etc. All taking up his time.

I haven't got kids but my time is still short, missus moans about me always in the garage, I have to work and pay the mortgage.

Dan's fastest lap this weekend was over 4 seconds faster than mine too. Much to my embarrassment. Embarassed
My excuse is it was the first race and I was faffing about getting used to the circuit again. It's still just an excuse though.


Last edited by Chester362 on Thu Sep 23, 2010 5:52 pm; edited 1 time in total
Back to top


Chester362
Supporter - Titanium
Supporter - Titanium
 
Posts: 940
Joined: 19 Jun 2005

Location: Cheshire, U.K.
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 5:26 pm » Post: #11 » Download Post

silikesguiness wrote:good stuff roy Very Happy how are you finding getting up to speed?i havnt raced for ages and was wondering if it just comes back to you Confused


It's just, err,,,,, like riding a bike really!

I don't think you'll have any problems Si, I'd recommend getting to a Mallory test afternoon or a trackday or two to get you back into the groove first.

Starting at the end of the season as I did this year isn't really the best. Everyone else is in "tune" mentally. I had to keep pushing out of the "comfort zone" too early.

I was forcing myself to take it a bit easier than I would've liked too. Just to make sure I wouldn't dump it. Trouble is, yeah it's nice and safe, but you end up further down the finishing order than you like. I had to keep convincing myself I was enjoying it, which I wasn't 'cos I was riding like a big jessie and not challenging up front.
I ended up leaving it to the last race to push it a bit, so if I did dump it I wouldn't loose any much needed track time.

I'm an old fart now and I'm enjoying it just as much as I ever did. More even as I'm more relaxed. I think that is the key.
Your riding skills may be a little rusty start with, but it'll soon come flooding back. The way I look at it is, if someone else can do it. Why can't I?
Back to top


MJ43

 
Posts: 156
Joined: 14 Nov 2004

Location: Middle England
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 5:28 pm » Post: #12 » Download Post

Roy it was good to see you back out and hopefully you can do a few more next season.

From a dearth of NSR's in previous years they were the most popular model on the grid this season Very Happy

In terms of tune you don't need a mega motor, reliability and handling are the most important. Aim is to finish, enjoy yourself and then win.

I know nobody believes me but the motor I ran at Anglesey was a totally stock KR-1 top end not even S, albeit on my tuned bottom end. That set up is reliable and showed it was fast enough to run at the front of the two strokes given the pace that weekend.

I have let the F250 slip over the last few years but will hopefully get it back up next season to somewhere it used to be. I have identified 9 possible KR's and am busy collecting names just so we have an idea of numbers.
Back to top


Chester362
Supporter - Titanium
Supporter - Titanium
 
Posts: 940
Joined: 19 Jun 2005

Location: Cheshire, U.K.
    Send private message View user's profile
    Reply with quote  

Thu Sep 23, 2010 6:11 pm » Post: #13 » Download Post

Hi Mark,
it was good to finally be back!

As far as the engine is concerned I'm more than happy with it. I won't be chasing horsepower. Just cleaning up the carburation a little. It may just be that the carbs need a little clean up.

I'm going to aim to do the whole season if I can. Going on my past p!ss poor record, that's not saying too much!
It's looking like F250 is going to be quite good next year.

I don't believe you about the KR at Anglesey either though! Wink Razz
Back to top


fontyyy

 
Posts: 3509
Joined: 10 Apr 2004

Location: Derbyshire, England
1991 Honda NSR250 MC21
    Send private message View user's profile Visit poster's website MSN Messenger
    Reply with quote  

Fri Sep 24, 2010 3:32 pm » Post: #14 » Download Post

MJ43 wrote:From a dearth of NSR's in previous years they were the most popular model on the grid this season Very Happy


There's at least a couple of others that should be out there too....paging watfordhorn...
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread
Back to top


silikesguiness
Supporter - Titanium
Supporter - Titanium
 
Posts: 2495
Joined: 11 Dec 2007

Location: chesterfield
1991 Honda nsr 250 mc21 sp
    Send private message View user's profile Send e-mail MSN Messenger
    Reply with quote  

Fri Sep 24, 2010 4:06 pm » Post: #15 » Download Post

and paging mr mcdonald if i had the money Rolling Eyes and will get to mallory when the bikes up and running roy Very Happy
_________________
ive seen more tarts than mr kipling
Back to top


Reply to topic   printer-friendly view
Page 1 of 3  Goto page 1, 2, 3  Next Download Topic

NSR250R Discussion

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  • NSR250 Forums Index
  • All times are GMT
Powered by phpBB © 2001, 2005 phpBB Group


Hosted by NSR250dotNET © 2008 NSR250dotNET