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Will I Lose Power By Upgrading My Tires?

Question:

Hello I have a 2004 Honda Rubicon 500 and I want to put a 2 inch Highlifter kit on it and upgrade the tires to 27 or 28 inch.

My question is will the bike be able to turn the tires well without significant power loss or will I have to use a dyno jet kit to get power back?

Nick Ackerson

Response:

Thanks for your email!

Anytime you install larger diameter tires on an ATV there will be a noticeable loss of initial take-off power in high range. It’s all about ratio’s relating to tire diameter.

If you start with a healthy, powerful ATV you won’t notice much loss, however, if your ride is marginal in the power department with stock wheels, you’ll find yourself needing to use low range in tight, low speed running or tranny problems will crop up.

A jet kit for your Rubicon is a good idea under these circumstances but it will not replace the low-end snap you’ll loose from the bigger wheels and tires.

Good luck!

Motorhead Mark

Can Honda Compete With Limited IRS Models

Can Honda continue to be competitive in the upper end of the marketplace with only one IRS equipped ATV? Dealers and consumers are asking big questions about what Honda might be up to.

We hear rumors of a new side-by-side and stories of more IRS in the 500 and 400 segments of its line-up. However, less than eight months ago the Honda marketing team stated the company had no intention of introducing an ATV with a motor larger than the current 680cc mill used in the Rincon.

This one has us confused.

WMA Round Five A Race to Remember

Press Release –

Women’s Pro Motocross proved to be one of the most exciting parts of the weekend as WMA Round Five took on Washougal, July 28, 2006.

The pro women were subjected to a last minute schedule change and had to practice at 7:00 am, immediately followed by Moto One at 8:00 am – all of this occurring prior to the morning arrival of the weekends’ other participants in the Men’s Outdoor National Motocross Series.

This didn’t stop them from delivering the kind of action that later kept the crowd cheering long after the men’s pro qualifying and practice were over.

Race one saw an aggressive Sherri Cruse grab the Girlyz sponsored Hole-Shot award but Jessica Patterson and Tarah Gieger were hot on her tail along with Ashley Boham.

Tania Satchwell and Vanessa Florentino were also in the hunt. Honda’s Patterson and Yamaha’s Gieger made the pass on Cruse, but Gieger soon slid out in a corner allowing Satchwell to move in past her. Satchwell made the best of it, closing the gap by lap six. Kawasaki’s Tania Satchwell was able to take the lead away from Patterson briefly as Patterson made a mistake in the whoops.

Patterson charged hard getting the lead back, holding on for the rest of the race. Satchwell did not give up however. She dished out relentless pressure, all the way to the end. Meanwhile, Mariana Balbi made her way up through the pack to claim yet another third place finish.

By the end of the race, she had closed the gap on the leaders, again showing her ability to fight her way to the front. Balbi was followed by Elizabeth Bash and Sherri Cruse who were in excellent form the entire weekend.

Moto Two was held at the end of the day. Scheduled for 5:15 pm, it was also delayed, as the men’s pro qualifiers and practices ran late. The pro women had a nine hour wait between Moto One and Moto Two. Not to be deterred, the women still put on a fantastic show for the enthusiastic crowd that stayed for the entire race as well as the podium celebrations.

Elizabeth Bash was hot off the start, winning the Girlyz Sponsored Hole-shot Award. She was followed by Jessica Patterson and Mariana Balbi. Patterson made the pass, taking the lead on the big downhill.

Tania Satchwell was all over the back wheel of Fox rider Mariana Balbi while Brazilian rider Balbi pursued Kawasaki’s Elizabeth Bash. Balbi was able to get by Bash in the back section but Bash reclaimed her position in the whoops. Meika Cornelius went down in the whoops in the first lap. By the end of the lap one, it was Patterson, Bash, Balbi, Satchwell, Cruse then Gieger.

On Lap Two, Mariana Balbi went down hard on the steep downhill, letting Satchwell, Geiger, Cruse, Florentino, and Whitmore get by, but quickly got back in the race. Tania Satchwell and Elizabeth Bash were in a heated battle by lap three with Geiger all over the back of Satchwell, making it a three way fight. While the competition raged behind her, Jessica Patterson pulled away gaining a 15 second lead.

Tania Satchwell finally got the jump on Elizabeth Bash on Lap Four Gieger also made her move, passing Cruse and Bash as well as she started her inevitable charge to the front. Mariana Balbi put the pressure on Sarah Whitmore on the big uphill, blazing by her in the woods, moving in behind Vanessa Florentino. Gieger and Satchwell then fought it out for the second spot, with Gieger finally getting the best of Satchwell, and setting her sights on Patterson who was still holding a 14 second lead.

Lap five saw the field start to spread out. Patterson was in the lead, then Gieger, Satchwell, Bash, Cruse, Florentino, Balbi and Whitmore. Patterson finally made a small mistake in the whoops, giving Gieger an opportunity to start decreasing the gap, reducing it to seven seconds. Bash and Cruse fought it out on the big uphill. Bash managed to hold of an aggressive Sherri Cruse as Mariana Balbi was finally able to get by Vanessa Florentino to pull in behind them.

By Lap Six, Gieger had shortened the gap to Patterson with only four seconds between them. She then reduced it to only a couple of bike lengths as they descended the big downhill with Gieger almost landing off the track in her aggressive pursuit. Gieger was unable to close the final gap however, as Patterson dug in and upped the pace, holding her off all the way to the checkered flag. At the finish line, it was Patterson, Geiger, Satchwell, Cruse, Bash, Balbi then Florentino, giving the overall win to Jessica Patterson with Tania Satchwell and Sheri Cruse in 2nd and 3rd.

A large crowd of excited spectators gathered around the podium as the women’s pro riders made their way up for interviews and trophy presentations. Champagne sprayed and teams and spectators enjoyed the post race celebrations in almost perfect weather.

With one race remaining in the championship, Jessica Patterson is 16 points ahead of Tarah Gieger, followed by Elizabeth Bash who is 39 points behind Gieger with Mariana Balbi and Tania Satchwell only 2 and 3 points behind Bash, respectively.

It all comes down to the last round to see if Patterson can hold on to the lead to take another championship. The last round will also decide who will take the 3rd, 4th and 5th positions. Girlyz racer, Alisa Nix, currently in sixth, was unable to race the second moto after giving it a try in moto one.

Nix dislocated her shoulder in the last round, taking her out of contention for the championship. The decision was made not to race and to try to return for the last race. This is a disappointing finish for the extremely competitive youngster who had some great battles and podiums this year, most recently winning the Mammoth Motocross race.

Don’t miss the final showdown at Steel City, Pennsylvania, August 25th. It is sure to be a memorable race as these brave women put it all on the line for WMA Championship finale.

Visit GIRLYZ.COM

Major Bearing Failure and Clogged Oil Filter

Question:

I have a new JS 400 4×4 bought in march 2006. I took it in for repairs as I could hear a loud ticking from the motor. The mecanic told me that an internal bearing was seized on the shaft and that the oil filter was plugged solid with metal filings.

This was its first servicing as it only has 200 clicks on it. My question is what are the chances of the rest of the internal parts being damaged from the metal filings?

Lionel Kersey

Response:

Thanks for your email!

In the case of a major bearing failure and metal filings clogging the oil filter I would suggest the engine should be torn down and completely cleaned, checked for any other related problems and then reassembled.

Simply repairing the bearing without a complete disassembly (if it’s possible to repair the bearing without doing this) of the engine and then returning the motor to service will most likely net another problem.

Your dealer should contact the maker for further advice on the recommended extent of this repair. I assume you are under warranty?

Motorhead Mark

LATEST ISSUE LANDING SOON!

Volume 9, #1 of All-Terrain Vehicle Magazine is hitting newsstands now!

In this issue you’ll get a glimpse of our project RZR, plus read about TOMCAR – one of the toughest off-road vehicles our crew’s ever tested.

You’ll also get the scoop on all the new ’08s, plus read about the 700 FI Griz and Cat’s 650 TRV.

This issue also features the new 950 Thunder Cat, the Polaris Hawkeye and Carter’s 250 Interceptor.

Get your copy today or subscribe online by clicking here!

Polaris 800 EFI RZR Hop Up: Razor Sharp

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When customizing our 800 EFI RZR, the intention was to use bolt on dealer or aftermarket accessories that increase performance, utility and style. After multiple modifications we ended up with a side by side that looks hot and delivers mind-blowing performance.

The already potent 800 EFI mill was dialed in using EPI’s Razor specific clutch kit with a new high strength belt, new secondary spring, primary weights and your choice of 2 primary springs that dial in engagement.

After installing the EPI kit we noticed an immediate improvement to how snappy and responsive the Razor became. Corner to corner we can “Tail Out” the Razor and back it into corners with simple throttle pumps.

Top speed was increased by a few MPH bringing our unit to around 65 with a tail wind. Out of the hole, the Razor will spin its ITP TerraCross meats.

To improve handling we chose 14” ITP SS 108 alloy wheels mounted to ITP TerraCross 26” tires. This package adds big time appeal and widens the stance of the Razor by a sizably increasing stability and overall handling.

Fox Podium X shocks made the already great handling unit ride even better. The added suspension performance is most noticeable when flying the Razor or running through whooped out, choppy doubles. On the trail the benefits are quickly realized and harsh hits from rocks and downed trees are muted.

Rock runners, a half windshield and the bimini top are all seen in the photo while the Pre runner bumper (Not shown) has since been added making for one wild looking UTV.

To get us out of the chocolate, Polaris supplied a 3500lb Warn winch that mounts easily and includes a removable wired remote and sturdy roller fairlead.

Grab the latest issue of All-Terrain Vehicle Magazine for more details and photos.

Can-Am Side-by-Side Theories

Rumors have accelerated about a new Pure Sport SxS UTV from Can-Am. In fact, hardly a day goes by without another story or sighting.

Here’s what we know – the engine/drivetrain may be based on a system used by the Ski-Doo division at BRP to drive a rather unique vehicle called the “Elite”. This twin tracked snowmobile positioned the driver and passenger similarly to a UTV and used a ji-normous 3-cylinder 4-stroke for motivation.

The recently out-of-production Elite was built for only two model years this decade. The Elite’s CVT based drive system would be completely workable in our estimation in a wild Pure Sport UTV application.

Don’t look for a fuddy-dud utility side-by-side from Can-Am. BRP has been true to its word since announcing its mantra: to ‘not produce anything that isn’t fun and the best performing in its class’.

We think best-in-class means most powerful. Stay tuned.

Polaris and Digger’s Provide Units for Recovery

Press Release –

Polaris Industries today announced the company is working with Minnesota Dealer, Digger’s Polaris & Marine, to provide Sportsman ATVs and RANGER side by side vehicles to help with the recovery efforts of the Interstate 35W bridge disaster.

“As a Minnesota company, we share in the sorrow this tragedy has left on our state,” said Polaris President and Chief Operating Officer Bennett Morgan. “It’s our hope that the units provided make this very difficult effort a bit easier for all involved.”

Prior Lake’s Digger’s Polaris will provide six Sportsman 500 ATVs and six Polaris RANGER 4x4s to the Minneapolis Police Department and OSHA immediately to aid in the effort.

Polaris vehicles also were used in the recovery and clean up efforts of Hurricane Katrina, at Ground Zero and during various Minnesota flood relief efforts.

“When our dealership was contacted to provide ATVs and Side by Side vehicles for the recovery effort, there was no doubt in my mind we would make it happen,” said Doug Nagle, owner of Digger’s Polaris & Marine. “This tragedy has hit very close to home and providing these units is our way to help with the effort.”

Kawasaki Mule Diesel With Power Steering

Kawasaki has offered a Mule with diesel power for several years now but this one has one distinct difference.

Recently, All-Terrain Vehicle Magazine has commented how cool it would be to add power steering to a UTV. The upscale Mule 3010 Trans4x4 diesel is the only UTV so far with this very in-demand feature.

Available in both 2 and 4-passenger configurations, this Mule takes advantage of the lower steering box ratio possible with electric power steering to reduce the number of turns lock-to-lock and assist with quicker, more precise handling, particularly in tight spaces.

We think this feature is a sure bet for the Teryx someday, too.

Grab the latest copy of All-Terrain Vehicle for more on Kawasaki’s 2007 offerings!

Kawasaki Brute Force 750 Revamped for ’08

The 750 Brute Force has been a huge success for Kawasaki and is still regarded as one of the top three performers in the Big Bore class. This year, the biggest BF gets fuel injection for its willing 750 V-twin.

Maybe not a big story, but nevertheless an important development for a popular model. No doubt throttle tip-in, cold starting and idle will be improved and Kawasaki is hinting there’s a noticeable power increase with the 32-bit electronic fuel management system that features 36mm throttle bodies.

New bodywork, particularly at the front, includes a restyled fascia and new bumper plus a nifty storage compartment on the front fender and pre-wiring for an aftermarket winch.

Suspension has been recalibrated with dual rate springs for better plushness and softer seat foam helps with rider comfort.

Also highly visible are polished aluminum rims and new aluminum footpegs.

Grab the latest copy of All-Terrain Vehicle for more on Kawasaki’s 2007 offerings!