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Tune an Engine
By Rob Hoyles on 21/04/2010 17:22:17
The art of engine tuning is a science many fine authors have spent hundreds of pages trying explain. Honestly, it’s not that complicated. Here’s how to tickle another paddock of ponies out of a four stroke
is absolutely vital to work out how I can improve it and which parts need replacing or upgrading to prevent engine failure. A good engine tune is generally a safe tune.”Other measurements include piston-to-valve clearances at various crankshaft positions either
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2009 Most Important...Yamaha YZF-R125
By Rob Hoyles on 18/10/2009 16:34:38
The littlest, cutest Yam has reawakened youth to the idea of misspending it riding motorcycles, which has got to be a good thing. We should all know better, but just can’t help ourselves
of getting lashed on cheap cider and threatening little old ladies down the precinct. So thank Yamaha for that.As kids, most of us here hankered after Yamaha RDs and DTs, dreaming of the day we could replace pedal power with the screaming resonance of pistons
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2009 Most Important...Aprilia RSV4 Factory
By Rob Hoyles on 18/10/2009 16:41:53
Few bikes have ever come as close to living up to the ‘Factory’ tag as this Noale nut-job. Expensive, hard to ride slowly, unruly on the road but totally in its element on a track – it’s just got to be the best bike of the year
Adjustment: Preload, compression and reboundFront brakes: Four-piston Brembo calipers, 320mm discsRear brake: Twin-piston caliper, 220mm discDry weight: 190kg (419lbs)Seat height: 179mmFuel capacity: 17 litresColour options: Red/Black
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2009 Most Important...BMW K1300R
By Rob Hoyles on 18/10/2009 16:42:47
Not many bikes manage to change people’s perceptions of an entire factory. But BMW engineered a seismic shift in attitude with this big-inch brute, the machine that put the tonic into Teutonic. Believe
Adjustment: Preload & rebound or BMW ESA II (op)Front brakes: Four-piston calipers, 320mm discsRear brake: Twin-piston caliper, 265mm discDry weight: 217kg (478lbs)Seat height: 820mmFuel capacity: 19 litresColour options: Silk/Lava Orange/Light Grey
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2009 Most Important...Yamaha YZF-R1
By Rob Hoyles on 18/10/2009 16:47:10
Genuine MotoGP technology lies inside the latest manifestation of the wonderful R1. It’s not flawless but it’s verging on the fantastic
, compression and reboundFront brakes: Six-piston calipers, 310mm discsRear brake: Twin-piston caliper, 220mm discWet weight: 206kg (454lbs)Seat height: 820mmFuel capacity: 18 litresColour options: White/Blue/Black
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2009 Most Important...Triumph Street Triple R
By Rob Hoyles on 18/10/2009 16:48:17
The term ‘all-rounder’ is usually associated with the phrase ‘lose the will to live’. But this machine is very different. That’s because it’s very good
Adjustment: Preload, compression and reboudFront brakes: Four-piston Nissin calipers, 308mm discsRear brake: Twin-piston Nissin caliper, 220mm discWet weight: 167kg (368lbs)Seat height: 805mmFuel capacity: 17.4 litresColour options: Matt Graphic/Matt Orange
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Longest Test: Suzuki GSX-R1000
By Rob Hoyles on 02/11/2009 10:36:24
The dark horse of this year’s litre class, the GSX-R1000 just keeps on impressing Visordown’s Deputy Editor and keen club racer, Rob Hoyles.
, compression, reboundFront brakes: Radial four-piston calipers, 310mm discsRear brake: Single-piston caliper, 220mm discWet weight: 203kgSeat height: 810mmFuel capacity: 17.5 litresColour options: Blue/white, black, white
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Living with a 2009 Suzuki GSX-R1000
By Rob Hoyles on 23/06/2009 11:12:08
Hoyles finds his youth again with Suzuki's mental GSX-R1000
out to suit the gorgeous road legal titanium Leo Vince end cans and the catalyst eliminator.As expected, with the catalytic converter removed, the bike was running a little on the lean side so, rather than wreck the valves and pistons, I got Rob
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Hayabusa versus radio controlled car
By Rob Hoyles on 14/01/2009 12:14:14
The fastest production bike in the world goes head-to-head at Santa Pod with the fastest radio controlled car in the UK. Who’s going to come out on top?
as the cold Bridgestone fails to grip the tarmac, the bike slewing ungracefully up the track. Meanwhile, propelled by a piston the size of a dormouse’s tadger, the car has already reached the halfway point and is showing no signs of slowing. The speed
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2007 Yamaha YZF-R1 World Exclusive full launch rep
By RobHoyles on 12/11/2006 16:18:47
Rob Hoyles reviews the 2007 Yamaha YZF-R1 for Visordown
adjustable monoshockFRONT BRAKESRadially-mounted six-piston calipers, 310mm discsREAR BRAKETwin-piston caliper, 220mm discWHEELBASE1415mmSEAT HEIGHT835mmDRY WEIGHT(claimed) 177kgFUEL CAPACITY18 litres IMPORTERYamaha UK (01932 358121) PRICE£9100 otr
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