The iBooster has actually been around for several years, but was previously known as the iCAT. According to the company, the iBooster is supposed to: make for easier starting; provide more torque, more power, and quicker revs; improve burn at all RPM levels for “works” style throttle performance. Basically, the iBooster is supposed to make your engine perform better.

The little device works by increasing the amount of time and intensity of the spark, therefore making a more complete combustion within the cylinder. This is supposed to translate into less residual fuel and more power.

We installed the iBooster F1 on our trusty 2005 YZ125, and first and foremost, were impressed by the ease of installation.

    • 1) Simply detach (unscrew) the sparkplug cap from the ignition wire.
    • 2) Attach the threaded portion of the iBooster onto the ignition wire.
    • 3) Attach the sparkplug cap to the open end of the iBooster cable.
    • 4) Reattach the sparkplug cap to the sparkplug.
    • 5) Give yourself a pat on the back. You’re done!

    The iBooster installed on a YZ125.

With the iBooster installed, we headed out to the track, and upon firing up the bike there was immediately a noticeable difference in the sound emanating from the exhaust. I had been a little skeptical about the product, so the crisp, clean note I heard was a pleasant surprise.

On the track the throttle response is markedly more responsive throughout the RPM range, just as the company claims. It is hard to say, without the use of a dynamometer, if there is an actual increase in power or torque. However, with better throttle response and more consistent builds through the RPMs, the little YZ125 performed better under a load (seat bouncing; hills; tight, rutted corners).

Before installing the iBooster, I had experienced an occasional bogging issue on the YZ125 at high RPMs that was jetting related but I had yet to figure out. After adding the simple device, the problem seems to have been alleviated, so the carburetor will be left alone for the time being.

So how could something that is so easy to install actually improve the performance of your machine? Well, pipes and silencers are pretty easy to install and they can make a world of a difference. Plus they can cost more than ten times the price of the iBooster. For around $90, you receive a whole lot of bang for your buck.  Price: $88.99 - $116.99

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    11/13/2012 12:35 PM

    iBOOSTER thanks Vital MX for a great product review but we want to directly address Arkmx's comment. iBOOSTER has never heard of an issue whereby the product quits working or fades over time. We absolutely stand behind our products and have a 100% Lifetime guarantee. No rider or magazine review has ever referenced a 'failure over time' issue. Arkmx: Not sure what happened with your YZ125 but want to make sure you're taken care of. Please contact us for your replacement product at no charge.

  • Desk Job

    6/28/2012 7:32 PM

    I thought this was maybe a new version (mine is Red/Black) but looks the same. Ive been impressed with my booster and definitely feel a difference on my YZ250. I can actually pull it off and put it on my CR450F (same one) and while the power is not really improved, it is a bit cleaner and does start easier. As for lifespan, ive had mine for over 2 years. I think its worth the 90 bucks

  • queen of spodes

    6/23/2012 5:27 AM

    That's what I suspected. $99 worth of temporary power. They compare to pipes, but those are hard steel which will last the life of the bike. If these are indeed designed to last 3-6 months before expiring, the price is way too high. As such I won't think about buying one.

    Thanks for the review Arkmx.

  • Arkmx

    6/22/2012 11:04 AM


    I put these on our two 125's (KX & YZ). After a five months of time on Zach's YZ 125, we ran into a problem. The morning of our LL's Area qualifier last month, Zach did not even make a lap of practice saying his bike was not running well on top end. Bike worked fine the day before in practice. So I started making Main Jet changes (3-times), checked the Stater for any issues, then thinking the only thing left in the system that was out of the ordinary was the I-Booster. Went ahead and removed it, took it out for a test run and it was back to running strong on top end. Back to a richer Main Jet and has been running great ever since.

    Not bagging the I-Booster here, but it must have shorted out etc, causing the bike to miss (feel like rich jetting) under full throttle.

    I have used the Answer Roost Boost back in the day with good luck (1986 KX 250) and not so much on the (1987 RM 250). The same "RB" from the RM worked great on a friends Quadzilla!

    As for now both our 125's do not have them installed. They may work great, but I don't like to take chances on my boys having a bad moto or a DNF from something I could have prevented.

    Who knows I may have had a bad one to start with....

    Just my experience with them.


  • stillwelding

    6/21/2012 9:10 PM

    Nice graphics yer showin there

  • ProMoto

    6/21/2012 7:13 PM

    Vitalmx product testing? Awesome! Is this a first?

  • queen of spodes

    6/21/2012 5:54 PM

    Wonders what the life expectancy is on these things. The Roost Boost (Answer) did similar things, but those were notorious for wearing out after a few months of regular use.

  • bayodome

    6/21/2012 9:31 PM

    Good question. We'll let you know in a few months.

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