Speed Locks in bikes

ninja1069 · 13th August 2007, 23:13

Hi,
i have heard recently that all the company sold bikes have a Speed lock fitted into them and if we are able to remove it we can reach great speeds on lower gears even.....So i would like to know whether this is true or not....And is the REV-LIMITER the same thing......And if its tru then how can i remove it from my Honda Unicorn....Will this have any adverse effect on the performance??

Moby · 14th August 2007, 00:55

As far as i know there is no such thing, called speed lock. Especialy for indian bikes. If your are talking about Revlimiter, it's used to stop engine from over reving which leads to serious damage to the engine. Of course there are Speedlimiters , but they are only used in Superbikes.

Spitfire · 14th August 2007, 14:00

Yes they are called revlimiters. Good to have them if you arent a speed freak.

yogesh sarkar · 14th August 2007, 16:12

Does you Unicorn goes till 9500rpm in 5th gear?

If no then there will be no use of removing the revlimiter. If it does hits the rev limiter in top gear, then you should concentrate on sprocketing to get a better top end.

Ps. to remove the revlimiter, you need to get a custom CDI made.

sreerama · 19th February 2010, 05:03

i think removing the accelerator sensor will do the job

JayPrashanth · 19th February 2010, 16:50

Quote:

Originally Posted by yogesh sarkar

Does you Unicorn goes till 9500rpm in 5th gear?

If no then there will be no use of removing the revlimiter. If it does hits the rev limiter in top gear, then you should concentrate on sprocketing to get a better top end.

Ps. to remove the revlimiter, you need to get a custom CDI made.

Sprocketing for a better top end on a Unicorn won't work. Higher gearing without a bump in power will make you go slower, not faster. So, don't bother.

About removing the rev limiter for the Unicorn, there are a few chaps in Malaysia/Singapore who sell them. Will check and let you know.

That said, removing the rev limiter is not an intelligent thing to do, especially since the gains involed might not last more than a few overrevs. It is there for a purpose, and the purpose is to prevent the engine exceeding it's safe rpm beyond which all hell could break loose in the engine.

Cheers,

Jay

tj123 · 19th February 2010, 17:16

Please don’t try this you may risk your engine life/performance.
A rev limiter is a device fitted to an engine to restrict its maximum rotational speed. This is usually carried out to prevent damage to the engine, however sometimes these devices are fitted to prevent an engine reaching the point at which it develops maximum power.
Rev Limiters prevent damage to an engine by interrupting the power that is distributed to the spark plugs, this prevents the engine from operating above a pre-determined RPM level known as the red-line.

Rennjit · 19th February 2010, 21:00

thread starter might have finished with whatever he wanted. This' a 2 yr old thread dug up for what?

akshay4587 · 19th February 2010, 21:54

Quote:

Originally Posted by sreerama

i think removing the accelerator sensor will do the job

What on earth is a Accelerator Sensor

CoNrOd · 21st February 2010, 14:50

I think he means a TPS (throttle position sensor), although it won't have any effect whatsoever

13th August 2007, 23:13	#1
ninja1069 Newbie Join Date: Aug 2007 Location: Hyderabad Posts: 2 Thanked: 0 Times	Speed Locks in bikes Hi, i have heard recently that all the company sold bikes have a Speed lock fitted into them and if we are able to remove it we can reach great speeds on lower gears even.....So i would like to know whether this is true or not....And is the REV-LIMITER the same thing......And if its tru then how can i remove it from my Honda Unicorn....Will this have any adverse effect on the performance??
	() Thanks

14th August 2007, 00:55	#2
Moby BHPian Join Date: Jul 2007 Location: TRV Posts: 56 Thanked: 0 Times View My Garage	As far as i know there is no such thing, called speed lock. Especialy for indian bikes. If your are talking about Revlimiter, it's used to stop engine from over reving which leads to serious damage to the engine. Of course there are Speedlimiters , but they are only used in Superbikes.
	() Thanks

14th August 2007, 14:00	#3
Spitfire BANNED Join Date: Jul 2006 Location: Panaji - Goa/Bangalore - Karnataka Posts: 3,312 Thanked: 774 Times	Yes they are called revlimiters. Good to have them if you arent a speed freak.
	() Thanks

14th August 2007, 16:12	#4
yogesh sarkar BHPian Join Date: May 2006 Location: New Delhi Posts: 238 Thanked: 37 Times	Does you Unicorn goes till 9500rpm in 5th gear? If no then there will be no use of removing the revlimiter. If it does hits the rev limiter in top gear, then you should concentrate on sprocketing to get a better top end. Ps. to remove the revlimiter, you need to get a custom CDI made.
	() Thanks

19th February 2010, 05:03	#5
sreerama BHPian Join Date: May 2006 Location: Chennai Posts: 88 Thanked: 11 Times	i think removing the accelerator sensor will do the job
	() Thanks

19th February 2010, 17:16	#7
tj123 Senior - BHPian Join Date: Aug 2007 Location: BLR Posts: 1,148 Thanked: 680 Times	Please don’t try this you may risk your engine life/performance. A rev limiter is a device fitted to an engine to restrict its maximum rotational speed. This is usually carried out to prevent damage to the engine, however sometimes these devices are fitted to prevent an engine reaching the point at which it develops maximum power. Rev Limiters prevent damage to an engine by interrupting the power that is distributed to the spark plugs, this prevents the engine from operating above a pre-determined RPM level known as the red-line.
	() Thanks

19th February 2010, 21:00	#8
Rennjit BHPian Join Date: Feb 2009 Location: Namma Bangalore Posts: 668 Thanked: 166 Times	thread starter might have finished with whatever he wanted. This' a 2 yr old thread dug up for what?
	() Thanks

21st February 2010, 14:50	#10
CoNrOd BHPian Join Date: Nov 2009 Location: Pune Posts: 38 Thanked: 7 Times	I think he means a TPS (throttle position sensor), although it won't have any effect whatsoever
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