Dunn entrusts EBC鈥檚 EPFA pads and floating discs on his Yamaha TZ250
Motorcycle racer and tester/contributor, Bruce Dunn, has managed to clinch the overall 2022 BEMSEE Bluehaze GP Championship with his EBC-equipped Yamaha TZ250.
The rider uses EBC鈥檚 EPFA road/track brake pad up front and standard replacement organic brake pad on the rear, as well as MD-series two-piece discs both front and back.
You can read his thoughts on the season below, as well as his plans for 2023, in his own words below (originally published in ).
鈥淎fter eight rounds, 1200 miles, 23 pistons, two cranks and one high-speed get-off, I’m the BMCRC 2022 Bluehaze GP Champion.
鈥淭he cost of keeping my TZ going this year has been something I鈥檝e tried not to think about until now. But I have noticed my bank account doesn鈥檛 seem to be so depleted now the season has finished.
鈥淲e changed pistons so often this year we ended up calling them ‘tear-offs’. These pistons are supposed to be changed every 150 miles聽鈥� this might sound a bit mental, but I have had them crack and fail shortly after this mileage. The reason for this short interval is that this TZ is fitted with an SJK kit; an over-the-counter power-up kit that increases horsepower by allowing the bike to rev higher.
鈥淏ut this extra rpm takes the standard 300-mile service life for pistons down to 150 miles. The same goes for the crank, which drops from 1000 miles before a rebuild to around 600 miles. The bike will cover around 125 racing miles at just one BEMSEE meeting, sometimes less, so popping new pistons in for every meeting is a logical thing to do when prepping the bike.
鈥淧lans for 2023 are already being made. Amazingly there are a load of things I need to look into for improvement. First of all, I have some new exhausts being made by Tony Green, not that the old ones are poor, but they鈥檙e an old design. In my experience new pipes always make better power, and I鈥檓 confident that Tony鈥檚 latest expansion chamber design will bring an improvement. I seem to remember someone telling me that when Aprilia ran their RSW250 in Grands Prix they fitted new pipes for every meeting. I won鈥檛 be going to that extent, but you see what I鈥檓 trying to do.
鈥淚 also have to spend some more time optimising cylinder volumes and ignition timing. At the moment, I am using the standard dimensions of the cylinder heads, volumes at 11.8cc and squish set to 0.7mm.
鈥淥ther updates will include a complete new set of bodywork, aiming for improved aerodynamics. The front of the fairing is sleeker, with narrower side profiles, and it extends further forward too. The seat is also heavily modified, now curving down at the back, with extended side skirting. This style of bodywork was used by a few teams that competed in the All-Japan Championship, and it鈥檚 also similar to the Tech3 factory Yamahas from 2000.
鈥淏ig thanks (as always) to: Bilstein UK, Roland at HCR, Rock Oil, 91传媒, BIKE IT and Stevelin Motorcycles.鈥�
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EPFA Pads
The USA-made EPFA sintered pad for fast street, track day and race is a premium long-life street pad with improved fade resistance and heat cycling and improved noise characteristics.
Floating Motorcycle Discs
Since their introduction, EBC’s ultra-lightweight floating motorcycle rotors have become one of the worlds best selling lightest and best performing discs available for all modern sport bikes.
