November 3rd, 2020, 07:08 PM | #1 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Danno's ultimate track build
PHASE-1 - 60bhp, 250-lbs w/1-gal in tank
Following-up from this thread: Honda RS250R season maintenance? Having gotten within 5-sec of track-record for 4T 250, I'm ready for next step up. I'm pursuing max-performance on track with minimal costs. More challenging than just buying $10k, $30k or $100k off-the-shelf bike. Although Honda NSF250R is very attractive. Some design-criterium:
Some design-specs, allowing for future doubling of power:
With that in mind, I'm going to park this here... Last futzed with by DannoXYZ; November 3rd, 2020 at 10:11 PM. |
1 out of 1 members found this post helpful. |
November 3rd, 2020, 07:59 PM | #2 |
ninjette.org guru
Name: john
Location: placerville
Join Date: Apr 2016 Motorcycle(s): ninja 300 Posts: 386
|
are you looking at a 350 2 stroke motor for this build?
|
|
January 17th, 2021, 04:05 PM | #3 |
ninjette.org member
Name: Keith
Location: Gardner KS
Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 Posts: 52
|
Good luck bud! Those NSF250R’s are super cool. Pretty pricey though. Do you know what frame and engine you’re starting with?
|
|
January 18th, 2021, 01:46 AM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Sorry I missed this question. Yup, I got used NSR250R MC21 frame & gullwing swingarm.
Frame & swingarm arm are more optimised for track than overbuilt Ninja 250 frame. It doesn't have to ever carry passenger, so it weighs 1/2 as much (frame+swingarm is over 30lbs lighter!). Yet is stiffer vertically and softer laterally. Then installing stock RZ350 engine for 60bhp (had to chop frame little bit). My main concern with original plan to buy RS250R was maintenance schedule. So I chose engine with great power-to-weigh ratio that can go at least 10k-miles between rebuilds. It weighs less than Ninja 250 engine and puts out TWICE as much power. There's incredible aftermarket support and I can upgrade to 100bhp easily. Best news is every single part of engine, even crank and cylinders have aftermarket replacement! So I can build an engine from aftermarket parts if needed!!! So target for 1st iteration is 60bhp @ 260-280lbs (i've backed off from CF wheels). Then next step in year or so is 100bhp @ 240-260lbs. |
|
January 18th, 2021, 02:04 AM | #5 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Thanks! Guy racing NSF250R in AFM was getting lap-times similar to 600 Supersport, about 10-15 sec/lap faster than me in Ninja 250. I should be able to beat it with this!
|
|
January 18th, 2021, 02:23 PM | #6 | |
ninjette.org guru
Name: john
Location: placerville
Join Date: Apr 2016 Motorcycle(s): ninja 300 Posts: 386
|
Quote:
cant wait to see it at the track you might just get bike jacked by me. |
|
|
January 19th, 2021, 10:37 PM | #7 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Quote:
I was hoping to race it in 350-Superbike, but I'm not sure if they'll allow me. Might be F3 only. Which sometimes has 1 or 2 competitors. Many times, Joe Baker was only one out there with his TZ250 in F2. We're going to have some more entries this year thanks to Julian Farnam of A•N•D AK-1 EX500 fame. He's building trellis-frame bikes using RZ350 engines for AFM-racing and I think 2 of them are spoken for already! Should be interesting beast as RZ350 engine's 40-lbs lighter than EX500 for same power-output. |
|
|
January 25th, 2021, 08:35 AM | #8 |
Fighting Texas Aggie '05
Name: Neil
Location: Hutto, TX
Join Date: Feb 2009 Motorcycle(s): '07 ZX6R, '08 Versys, '09 250R Track, '93 F2/F3 Track Posts: A lot.
|
Watching this with great anticipation. Should be amazing.
__________________________________________________
Keep it rubber side down and enjoy the ride Get healthy - Get Fit - Change Your Life Click Here Or PM Me To Find More - Advocare |
|
February 2nd, 2021, 11:51 AM | #9 |
ninjette.org sage
Name: bruce
Location: northern illinois
Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999
|
interesting concept. These thoughts have been running around in my cranium for a few seasons now. I put together an Aprillia 250 cup bike with the RZ350 engine. It was great until the trans let go. parts are at the unobtainable point now. Then I thought a 450 MX engine in the Ninja250 chasis. Aside from the short gearing I cant think of a reason not to.
|
|
February 3rd, 2021, 11:08 AM | #10 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
|
Good to hear from you Bruce!!!
You can install Banshee trans into RZ350 engine. First 3 gears have closer spread while top 3 gears have bigger spread. Will need to increase sprocket-ratios to get same top-gear. There's even guy in Europe making custom-gears in any ratios you want. Should use RZ shift-drum and forks, seems to operate a little slicker. Pro-Mod trans shift best with undercut dogs. Some Banshee transmissions for sale. Great idea on 450 engine. There's talk of using Honda 450 engine too. Last futzed with by DannoXYZ; February 5th, 2021 at 10:16 AM. |
|
March 4th, 2021, 11:28 AM | #11 |
ninjette.org member
Name: Tracy
Location: Hawaii
Join Date: Oct 2020 Motorcycle(s): Suzuki JPN Katana 750 , 1994 Suzuki Pro Stock Motorcycle , 2001 Ninja 250 Posts: 233
|
Whoa, just saw this, nice build DanO.
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
250R NA Build - Ultimate | mgentz | 2008 - 2012 Ninja 250R Tech Talk | 1204 | April 7th, 2022 11:16 AM |
Track build | ROB654 | 2008 - 2012 Ninja 250R Tech Talk | 9 | June 5th, 2017 10:22 AM |
[RideApart] - TrakTape is the Ultimate Way to Cover Your Lights for Track Days | Ninjette Newsbot | Motorcycling News | 0 | March 22nd, 2017 10:24 PM |
Need help with Track build | jmk420 | Ninjettes At Speed | 35 | June 24th, 2014 05:59 PM |
[topix.net] - Freestyler Josh Borne guest stars on Discovery's Ultimate Car Build Off | Ninjette Newsbot | Motorcycling News | 0 | June 25th, 2010 07:50 AM |
|
|