14T front sprocket

Petta · Jul 29, 2014

Hello.

Is a problem with 14T front sprocket for Hyperstrada?

Or it works good?

I had problems with rev limiter.. Is it possible?

Do you have 14T front sprocket?

Thanks.

niiico · Jul 29, 2014

Do you plan to climb trees with your bike?

Petta · Jul 29, 2014

witty..

niiico · Jul 30, 2014

Ok, seriously, there should be no pb to mount a 14T front sprocket. What do you call "pb with rev limiter"?

niiico · Jul 30, 2014

This table may interest you :

GuyW · Jul 30, 2014

I have installed a 14t sprocket as I found it too highly geared. It revs about 7% faster but unless you plan on revving it out in top gear it should not cause a problem. I did not notice any increase in Fuel consumption.

niiico · Jul 30, 2014

Or this one :

Petta · Jul 30, 2014

The problem with 14T sprocket:

1st gear max. 8500 rpm
2nd gear max. 9000 rpm
3rd - 6th gear was all ok, max. 10500 rpm.

I dont know, how you call rpm limiter??

Now, with 15T is all ok. I dont know, where is the problem..

Maybe will be ok with 14-47?

Petta · Jul 30, 2014

GuyW said:
I have installed a 14t sprocket as I found it too highly geared. It revs about 7% faster but unless you plan on revving it out in top gear it should not cause a problem. I did not notice any increase in Fuel consumption.

Thanks. And max rpm on 1st and 2nd gear??

niiico · Jul 30, 2014

Never heard about a different rpm limit depending on the gear...

zippy49 · Jul 30, 2014

Could be a break-in setting? How many miles do you have on yours, Petta?

I would never wind any bike all the way to redline in first or second. Too hard on the drivetrain!

Petta · Jul 30, 2014

I have 9000 km.
I spoke with a guy from hypermotardclub with Hyperstrada Z47 rear and
he has the same problem, i think..

I need someone with 14T or Z47 and his experience.

If you know someone with this change, please, let me know..

GuyW · Jul 30, 2014

Petta said:
Thanks. And max rpm on 1st and 2nd gear??

I have never found the need to to hit the rev limiter so don't know. I would say "adequate".

The reason I installed the 14th sprocket was to make it more manageable in traffic and on dirt roads. If all you do is blast around the country side it is probably not necessary.

Guy

Petta · Jul 31, 2014

Thanks.
But on the track is a problem. Now, i have in 2nd gear 1500 rpm less..
Please, let me know, if you try limiter in 1st or 2nd gear..

jerdog53 · Jul 31, 2014

I have a 14t on the front and love how snappy it is.

Petta · Jul 31, 2014

And rev limiter in 1st and 2nd gear?

Confirmed by the guy with 47T rear, he has less max. rpm in first and second..

How is that possible?

PomGP · Jul 31, 2014

Has anyone actually tried going up to a 16 tooth front to knock the gearing back a bit.
We tend to ride fairly long straight roads over here so a few less revs would be a bonus.
I don't expect that the top speed would really increase as a lot of BHP is needed to increase top speeds.

jerdog53 · Aug 1, 2014

Why so concerned about the rev limiter?

Petta · Aug 3, 2014

On the track i am very close to rev limiter and now i have 1500 rpm less. That is a little problem..

StefanR · Aug 3, 2014

PomGP said:
Has anyone actually tried going up to a 16 tooth front to knock the gearing back a bit.
We tend to ride fairly long straight roads over here so a few less revs would be a bonus.
I don't expect that the top speed would really increase as a lot of BHP is needed to increase top speeds.

I changed the sprocket from 45 to 41.
Read more here:
http://hyperstrada.com/mechanical-technical/358-changing-rear-sprocket.html#post3491

14T front sprocket

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