January 7th, 2019, 02:40 PM | #41 | |
ninjette.org sage
Name: Timm
Location: West Seneca, NY
Join Date: Oct 2015 Motorcycle(s): 2006 1050 Speed Triple, 2010 250 Ninja racebike, YZF320RR? Racebike Posts: 556
MOTM - Nov '15
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Quote:
I did a ZX6R front end on a very light (285 lb) project bike and I had the same issue. Did you go lower on the spring rate? I had to do that with my 290lb 250 Ninja with the stock front end with emulators. Even though I weigh around 190 lb I had to use springs that were close to the stock spring rate. |
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January 7th, 2019, 03:46 PM | #42 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
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/added the resize tags to a number of the posts in this thread for it to show easier on all screens
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January 7th, 2019, 04:11 PM | #43 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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Adding those under seat pipes to the bike increased the system length quite a bit, did you notice any difference in the power or where peak power is now ? More or less torque ?
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January 8th, 2019, 09:06 PM | #44 |
ninjette.org member
Name: Scott
Location: New Brunswick, Canada
Join Date: Mar 2016 Motorcycle(s): 2009 BMW F800GS, 2010 BMW G450X, 1989 Hawk GT, 1974 CB360, 1990 VTR250 Posts: 42
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I don’t own, and never rode the bike. Paul seemed happy with the result. He chose to do two into two with this system, no crossover.
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January 9th, 2019, 02:01 AM | #45 | |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
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Quote:
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"trying not to get old" |
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January 9th, 2019, 04:02 PM | #46 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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January 9th, 2019, 04:03 PM | #47 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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Looks like Dropbox has a fault !
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January 10th, 2019, 07:49 AM | #48 |
ninjette.org member
Name: Scott
Location: New Brunswick, Canada
Join Date: Mar 2016 Motorcycle(s): 2009 BMW F800GS, 2010 BMW G450X, 1989 Hawk GT, 1974 CB360, 1990 VTR250 Posts: 42
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How easy was that swingarm to swap in? The Ninja600R swap took 5 minutes
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January 10th, 2019, 08:26 AM | #49 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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If I hadn't changed all the bearing & had the arm blasted & powder coated then, it would have been a 5 minute job.
Points to note;- 1. The ZZR swingarm pivot is 16mm, KR-1S is 20mm, solution, is a piece of od20/id16 stainless steel pipe cut to length to suit. 2. The KR-1S swingarm has sufficient room for 4x neddle roller bearings, but only 2 are fited as standard. I used 4 works a treat should last longer than the bike. |
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January 10th, 2019, 02:03 PM | #50 | |
ninjette.org member
Name: Scott
Location: New Brunswick, Canada
Join Date: Mar 2016 Motorcycle(s): 2009 BMW F800GS, 2010 BMW G450X, 1989 Hawk GT, 1974 CB360, 1990 VTR250 Posts: 42
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Quote:
However, we won't put one on this bike as the stock swingarm must be retained in LWSS250 Class. |
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January 10th, 2019, 03:49 PM | #51 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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The ZZR & KR-1S frames are very similar, I think Kawasaki just retasked the production from KR to ZZR by changing the extruded side rails & internal cross bracing to suit the ZZR.
My little motorcycle party quiz question is what was the most powerful 4-stroke motorcycle by HP for the longest time ? Answer the GPZ/GPX/ZZR/Ninja 250. Rated at 45hp by the factory, for 180bhp/Litre !!!!! They all say what, but it was launched in 1984 (Japan only) and was still in production until the 300 took its place, but still exists in parts of the world as a 250, but based on the 300 engine. It took until around 2005/06 before a litre bike made a claimed 180hp ! So for 20 years the baby Ninja’s were the most powerful engines you could buy. The 4 cylinder 250’s didn’t make any more power due to Japanese regulations & the 600’s never quite matched the HP per litre on the baby Ninjas until the very late 90’s or early 2000’s but they never surpassed them. . Interesting that the engine tech for these kinds of power levels existed way back in the 80’s. Interestingly, rumour has it that Kawasaki May be planning to launch a new 250 4-cylinder !!! |
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January 10th, 2019, 06:37 PM | #52 |
ninjette.org member
Name: Scott
Location: New Brunswick, Canada
Join Date: Mar 2016 Motorcycle(s): 2009 BMW F800GS, 2010 BMW G450X, 1989 Hawk GT, 1974 CB360, 1990 VTR250 Posts: 42
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Paul’s only dyno’d at 33hp. He used to have a KR-1S when he lived in England
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January 10th, 2019, 07:20 PM | #53 |
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
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I think there's lots of errors in online specs and repeated mistakes in copying those errors site-to-site. Only 4-cylinder 250s got 45hp and to get it, they had to redline @ ~19000 RPMs+ !!! The ZXR-250a and ZXR-250c (1988-2004) 4-cyl models were only Kawi 250s that had 45hp and used 4x CVK-D30 downdraft carbs to flow enough air and fuel. That's twice as many same-sized carbs as we have on our Ninjettes! One of the few correct spec-sheets for ZXR250 that didn't confuse it with an EX/GPz250 or ZZR250 (note sportier frame specs): https://www.motorcyclespecs.co.za/mo...r250r%2089.htm
I was eyeing mid-90s CBR250RR 4-cyl for sale in SF for while. Just worried about getting parts for it. Last futzed with by DannoXYZ; January 11th, 2019 at 02:42 AM. |
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January 11th, 2019, 01:23 AM | #54 | |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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Quote:
I'm going to get mine dyno'd before I add the big bore & then after to see how they compare. |
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January 11th, 2019, 02:31 AM | #55 |
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
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All manufacturers specify HP at crank. It's more consistent and the higher numbers without drivetrain losses is better for marketing. A newgen has ~29hp at crank and typically dyno-tests with 25-26hp at wheel.
Here's the 250s I want: https://www.cycleworld.com/250cc-two...omparison-test |
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January 11th, 2019, 02:53 AM | #56 |
ninjette.org guru
Name: Chris
Location: Bristol, UK
Join Date: Feb 2016 Motorcycle(s): ZZR250, VFR800 Posts: 491
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You & me both, but they are really expensive now. People over here (UK) have added Banshee snowmobile engines to some of these. They are based on what was the RD/RZ350 from the mid 80's, but can be taken to 500 or 550cc, with 80-90hp from a leightweight parallel twin 2-stroke !
My plan was to supermono the ZZR, but I liked the little Ninja emgine so much I decided to keep it. I have Versys-X 300 which uses the 300 Ninja engine, so the big bore plan was hatched to try to make 40hp at the rear wheel. We'll see how I get on Last futzed with by Mohawk; January 11th, 2019 at 04:09 AM. |
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January 11th, 2019, 06:09 AM | #57 | |
ninjette.org member
Name: Scott
Location: New Brunswick, Canada
Join Date: Mar 2016 Motorcycle(s): 2009 BMW F800GS, 2010 BMW G450X, 1989 Hawk GT, 1974 CB360, 1990 VTR250 Posts: 42
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January 22nd, 2019, 10:42 AM | #58 |
ninjette.org newbie
Name: Jamie
Location: Leitch Vegas, KY
Join Date: Jan 2019 Motorcycle(s): 05 ZX-10, 02 ZRX1200, 00 ZRX1100, 13 300 Ninja, 99 AntiCruizer (1 off chopper), 07 CRF80, 07 CRF70 Posts: 9
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Fantastic work!!! Beautiful bikes! I'm considering attempting a 2006 SV650 fork swap on my 2013 300 Ninja. This could get interesting. lol
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