Yamaha 67 mph in a 700 Rhino, with passenger

s2k1

Member
Feb 27, 2009
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Just thought i'd share the results of a 700 Rhino I just finished.
Took it out to Ocotillo Wells this morning to do some testing with the customer and check some EFI mapping in the real world.

The Rhino is a 2 seat SDR built Rhino 700 with the usuals, 2 seat cage with aluminum roof, seats, bumper, doors, wheels and tires, long travel, etc.

It came to me with an MSD Charge FI, Muzzy duals, an AFE intake, and a BRP sheave kit.
On map#4, it topped out at 48 mph, indicated on the stock dash.

It got an 11:1 stock bore CP piston, Web Cam and rockers, Benchmark mild port job, +1mm valves, 5 angle valve job, and valve spring/retainers. Benchmark clutch tuning, and still using the stock throttle body, nothing exotic here.

After sorting out the mapping, with both of us in the Rhino, plus a laptop and an Autronic air/fuel ratio meter, it did 67 mph indicated down San Felipe Wash and Shell Reef road. It was pretty impressive, and the best part is how hard it pulls from about 55 mph to 65 mph, like a cheetah!

Not bad I think.
Sorry, no pics or video. :eek:
 
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pronstar

President, LBC Chapter - UTVUnderground Approved
Jan 28, 2009
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What RPM were you turning?
I hit 63 in my Rhino...I don't have a tach but it was screaming.
 

s2k1

Member
Feb 27, 2009
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Ramona, CA
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What RPM were you turning?
I hit 63 in my Rhino...I don't have a tach but it was screaming.
That was about 8600 RPM. Hit the limiter at 8000. Raised it to 8500, hit the limiter again. Raised it to 9000, pulled to 67 mph and that was all it had. Lowered the rev limiter down to 8800 RPM. The cam would be considered a Stage II. It still idles good, and makes great torque down low. We did some pretty good rock climbs in 4 low at low RPM just to try it out and it worked great.
 

s2k1

Member
Feb 27, 2009
434
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Ramona, CA
www.benchmarkperformance.us
What is considered a relatively safe rev limit for a 660 & 700?
I think it depends on who's opinion you are asking. A lot of the Rhino motors I build turn over 8000 rpm, most of the time. 9000 is probably a reasonable number. The 660s sure like to gall the piston pin though. The 700 rod has a larger bearing on the big end, and a larger pin on the small end. Plus, the 700 rod has a radial channel in the center of the small end of the rod to help with pin oiling. The 700 is actually a very nice engine.
The last Teryx I did is turning 10,500 on the chassis dyno.
 

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