Nikkon spannies on a standard KR1?

robsa · Post by **robsa** » Tue May 12, 2009 10:06 pm

Hey guys

Well, I have just been drooling over the nikkon two-stroke 'spannies and was wondering what sort of gain I would see fitting a pair to my totally standard KR1. I assume I would need to maybe change the air filter? Would I need to re-jet too? Any suggestions?

Would I see any power gain? I assuming I would. They are so gorgeous aren't they? Particularly the ones for the NSR250! They look like they are tiger-striped due to the weld seams,,,,

Thanks to anyone who can shed a little light on the matter for me!

*salutes*

Robsa

scooble · Post by **scooble** » Tue May 12, 2009 10:25 pm

I fitted a set of Nikkons to my (slightly) standard KR1 engine (although mine are wrapped). I have done several plug chops on standard jetting and everything looks fine. I understand that they are supposed to give a bit of a boost to the midrange with a slight loss to the top. I never rode mine on standard KR1 spannies, so couldn't comment on a back to back comparison, but it seems to fare pretty well on short circuits like brands or cadwell. All in all - pretty good and sound nice too

garye345 · Post by **garye345** » Tue May 12, 2009 10:25 pm

robsa wrote:Hey guys

Well, I have just been drooling over the nikkon two-stroke 'spannies and was wondering what sort of gain I would see fitting a pair to my totally standard KR1. I assume I would need to maybe change the air filter? Would I need to re-jet too? Any suggestions?

Would I see any power gain? I assuming I would. They are so gorgeous aren't they? Particularly the ones for the NSR250! They look like they are tiger-striped due to the weld seams,,,,

Thanks to anyone who can shed a little light on the matter for me!

*salutes*

Robsa

dont know about the above but you will need a rear exhaust mount-standard kr1 did'nt have them fitted.

Post by **alimorg** » Wed May 13, 2009 12:40 am

I run a bog stock KR-1 with nikkons, the best bit about them is the noise - they sound fantastic, next is lightness they actually have to be tethered when not on the bike they are that light - a strong breeze would blow them away!!!
Cheers
AL

TwoStroke Institute · Post by **TwoStroke Institute** » Wed May 13, 2009 7:58 am

Most aftermarket chambers don't show big jumps in output, they will 'come on' earlier, hold on for longer and of course sound better. Mainly due to the rolled cone from sheet construction rather than the pressed sections OEM pipes have. A cone pipe will always outperform a pressed/hydro formed pipes.
Power comes from the engine.

robsa · Post by **robsa** » Wed May 13, 2009 1:02 pm

Sweet, thanks guys.
So where do I get rear hangers from then?!

the-elf · Post by **the-elf** » Wed May 13, 2009 6:14 pm

robsa wrote:Sweet, thanks guys.
So where do I get rear hangers from then?!

The Nikkons (that I've seen) were designed for the KR1 and unless they are new ones which have been updated for the KR1S they don't need the rear swingarm mount. I had some fitted on mine for a bit and I had to have the braket welded to them to mount them on the KR1S rear swing arm mount.

The best exhausts we have found on the dyno (with a tuned engine), are Lomas, followed by standard KR1S, then Nikkons, then Gibsons. the original KR1 exhausts are probably even worst than these, but I can't remember

.

There are other makes out there but I've no idea of their preformance. The Nikkons and the Gibson gave a big mid range improvement at the expense of RMP (lost revs and overrun) and Top end power

Bertie_Mollie · Post by **Bertie_Mollie** » Wed May 13, 2009 6:35 pm

robsa wrote:Sweet, thanks guys.
So where do I get rear hangers from then?!

Hi Robsa,

I think I have a rear hanger if you need one.

Let me know if I can help.

Cheers

Andrew

Garry · Post by **Garry** » Wed May 13, 2009 8:51 pm

nikons i have don't need the rear mounts (i assume you mean the bracket
under the frame)

they just mount on barrel and rear footrest hangers - as ali says they
are featherweight and sound great - not rejetted for mine

mgtkr1 · Post by **mgtkr1** » Wed May 13, 2009 9:24 pm

i have nikons, sound awesome and weigh nothing. perform well enough with a tuned engine and midrange is evident. for a tuned engine its not really ''that'' peaky. std pipes are the best widely available behind lomas. nikons are prob the best aftermarket pipes you can get that were around back in the day unless you go into tailor made stuff like tony green pipes/swift and huxley ect but that goes without saying, a pipe designed to work with a tuned engines requirements is bound to outperform anything if done right but thats another story. the fact that lomas and nikons work as well on a std motor as they do on a fairly highly tuned motor is testament to the design. mine is yet tobe dynoed with every area tuned from cases to cyl head /carbs ect but seat off pants dyno is promising. i definitly reccomend nikons as good overall pipes with extremely light weight to anyone in search of pepping up the performance/saving weight and that oh so distinctive kr noise. the sound of a tuned kr with thin gauge pipes is known to make ones spine tingle and most tz like in its wail. big carbs enhance this.

Post by **alimorg** » Thu May 14, 2009 11:20 pm

robsa wrote:Sweet, thanks guys.
So where do I get rear hangers from then?!

My nikkons attach at the front (engine), and at the back - (footrests) there is no provision for the middle hanger that the kr-1S has - its not needed
Cheers
Al

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Nikkon spannies on a standard KR1?

Nikkon spannies on a standard KR1?

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