World 500 GP Racer
Join Date: Mar 2011
Location: Oceanside, CA
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|General Sportbikes This area is for sport bike discussion in general. Topics that don't really belong anywhere else can go here. Questions can be answered and addressed to fully understand certain aspects of the sport. If your question is manufacturer specific please post it there.
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The rotax twin in the aprilias is also one of the most unburstable engines ever made .Some had issues with clutch slave seals , but that was because they were using the wrong type off fluid in them ..They dont use clutch fluid ,they use 10w hydraulic mineral oil . Mine did 50,000 miles and never once did it let me down or have it valve clearance checked .Just changed the oil every 3000 miles .. And it was still going strong when I sold it . My buddy had a VFR over the same period and he clocked up more problems with his Honda than I did with the Italian ... Oooo did he not ever hear the end of that
The funny thing, when you think about it, is that a Honda bike with mechanical problems is as rare as a Kawasaki Ninja without stickers.
Aprilia faults .. starter relay failed ,jumped the terminals to get home .. Replaced it with a yamaha one .. that was it
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|I do wear a helmet, as a matter of fact, along with other protective gear. But, the fact that you “certainly hope” I wear a helmet is so condescending it makes me want to ride a tricycle completely naked doing doughnuts in your front yard screaming Beastie Boys lyrics at midnight. Trust me, you do not want that. My buttocks are extremely pale and unsightly, especially in moonlight.|
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Why not synthetic?
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It's the rubber they use for the seals gets eaten by yer average clutch fluid . Many KTM bikes including mine also use it. Magura brand an expensive version, I use Citroen hydro suspension fluid much cheaper and exactly the same thing.
I prefer a twin for the street, as it makes its best torque and power closer to the engine speeds you use when riding on the street. Fours make their best torque and power up top, so you sort of have to choose between torque and civility.
Of course if your four is big enough, it doesn't matter because you have plenty of power and torque even when you aren't near the engine's peak, but then you are dealing with a quite large engine and the big bike to carry it, and I find that non-ideal. If you don't mind a big bike, such as for touring, then a big four (or even better, a six) will give you more of everything, everywhere. If you want big usable torque in a smaller and more nimble bike, then a twin is the better answer.
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Starting to think getting a twin this spring will be a fun ride although now, instead of trading in the 600 i4, I want to get another bike--a twin.
When I was 17, I bought a used single cyl 1968 BSA 441, and it was tons of fun. Was never able to kick start it even with the compression release lever and had it backfire my knee almost up to shoulder height...thank god I lived where there were lot's of hills so bump starting became the norm.
Fond memories of the sound though: the 441 was a awesome sounding thumper--the sound of that engine made me smile everytime I rode it.
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