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500 engine into a nsr 250

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chillpill
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PostPosted: 16:24 - 08 Jan 2009    Post subject: 500 engine into a nsr 250 Reply with quote
Surprised https://www.dreamgate.ne.jp/NSR/Project%20NSR/NSR500/500_main.html

i want one Drooling
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daemonoid
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PostPosted: 16:30 - 08 Jan 2009    Post subject: Reply with quote
Get as far as the last page?

Quote:
I got it out for a good ride today and it just does not seem very rideable. It vibrates extremely, extremely bad, and it just did not feel right in the turns.
I just hate to ride it very fast when it feels like every bolt in it will vibrate out in less than 2 minutes.
So there you go, would Chris recommend this conversion? No!! Sure it can get the front wheel up in third gear, even fourth, but the bike is unrideable.

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NSR Mick
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PostPosted: 16:32 - 08 Jan 2009    Post subject: Reply with quote
Nice project but. Wink

Quote:
After several days of Chris riding Project NSR500 he felt the bike was worse than before and just felt the bike was unrideable and not practical.

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chillpill
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PostPosted: 16:34 - 08 Jan 2009    Post subject: Reply with quote
i know that , but practicallitys not why i like motorbikes Wink
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sagalout
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PostPosted: 17:45 - 08 Jan 2009    Post subject: Reply with quote
He doesnt mean its bad at keeping off the rain and doesn't have hard luggage - he means its rubbish to actually ride.

Presumably you do like motorbikes because of how they ride?!
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ms51ves3
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PostPosted: 17:47 - 08 Jan 2009    Post subject: Reply with quote
Why put it in an NSR250 though Confused

Clicky

A TZR125 frame with a CR500 engine. Sounds lovely on the over run.
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Wafer_Thin_Ham
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PostPosted: 17:50 - 08 Jan 2009    Post subject: Reply with quote
Should have put an RG500 lump in there.
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Kickstart
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PostPosted: 17:52 - 08 Jan 2009    Post subject: Reply with quote
Hi

Nice idea, but suspect the problem was that the engine mounts were not up to the job, allowing it to vibrate. Looks like he has tried to avoid any perminant changes to the frame and hence built up a mounting cage.

TZR being a steel framed bike might be a better choice as it would make it far easier to weld in decent engine mounts.

All the best

Keith
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CaNsA
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PostPosted: 17:56 - 08 Jan 2009    Post subject: Reply with quote
When i read the topic my first thought was, "Jesus, that would tear its self apart in seconds".

Good idea though, shame it doesnt hold up in real world tests Sad
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ms51ves3
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PostPosted: 18:06 - 08 Jan 2009    Post subject: Reply with quote
Big_Ham wrote:
Should have put an RG500 lump in there.


No way. RG500 engines should stay in RG500 frames Wink
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chillpill
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PostPosted: 18:55 - 08 Jan 2009    Post subject: Reply with quote
yeah he did say at the start he wanted it so it could easily be restored back to a 250 wich is a bit of a bummer because that could of been brilliant if there wasnt the vibration

the idea of a 500 single in a 125 frame is just mouthwatering though , chives that tzr is a beast Drooling
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Flip
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PostPosted: 21:06 - 08 Jan 2009    Post subject: Re: 500 engine into a nsr 250 Reply with quote
chillpill wrote:
Surprised https://www.dreamgate.ne.jp/NSR/Project%20NSR/NSR500/500_main.html

i want one Drooling


That exhaust looks sh1t. Confused
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stevo as b4
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PostPosted: 23:38 - 08 Jan 2009    Post subject: Reply with quote
BLUEX5 wrote:
ms51ves3 wrote:

No way. RG500 engines should stay in RG500 frames Wink


They do look good in Spondon frames or RGV250 frames as well Wink


It's just a pity that they sound like a washing machine full of spanners when you start them up though! The RD500 is not quite as potent even when tuned, but it sounds so smooth like the cranks are running in teflon.
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ms51ves3
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PostPosted: 23:48 - 08 Jan 2009    Post subject: Reply with quote
stevo as b4 wrote:
BLUEX5 wrote:
They do look good in Spondon frames or RGV250 frames as well Wink


It's just a pity that they sound like a washing machine full of spanners when you start them up though! The RD500 is not quite as potent even when tuned, but it sounds so smooth like the cranks are running in teflon.


RG500s sound lovely. Don't know what RG you were listening to Laughing

The RD500 doesn't have the lovely 'wur' that you get with the square 4 RG engine.

Clicky
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Wafer_Thin_Ham
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PostPosted: 09:02 - 09 Jan 2009    Post subject: Reply with quote
ms51ves3 wrote:
Big_Ham wrote:
Should have put an RG500 lump in there.


No way. RG500 engines should stay in RG500 frames Wink


Nah, the RG500 frame is far too weak and bendy for it to be of any use for spirited riding.
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ms51ves3
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PostPosted: 12:28 - 09 Jan 2009    Post subject: Reply with quote
Big_Ham wrote:
ms51ves3 wrote:
No way. RG500 engines should stay in RG500 frames Wink


Nah, the RG500 frame is far too weak and bendy for it to be of any use for spirited riding.


Part of the fun Laughing
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st3v3
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PostPosted: 20:03 - 09 Jan 2009    Post subject: Reply with quote
Seriously, why would any sane person want to change anything with an NSR250?

Crazy fools.. Rolling Eyes
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