Limitation Bore-Up Yamaha Byson

Limitation Bore - Up Yamaha Byson , Can Up to 200 cc

Although recently on the market , but many owners of Yamaha Byson who wanted besutannya bore-up . One of them Bro Paul from Surabaya , East Java . " According to a count AUTOMOTIVE , engine Yamaha Byson it can be a maximum of how many cc capacity with bore-up only aliases without changing the crankshaft and piston ? " She said via e-mail .
Sure, some workshops in Jakarta, no one has work on it . " Maybe because it is still so new owners do not intend Byson tinkering the engine innards , " Teddy Cong suspect , boss of the garage shop at the same speed in the region of PT Global Motorindo strain , Cempaka Putih , Central Jakarta .
Okay not masyalah . Incidentally AUTOMOTIVE cylinder block can already standard specifications of the manufacturer Yamaha Byson Indonesia. Starting his liner thickness and the distance between the outer lip to lip liner cylinder bolt hole nearby . The spec will be found out how much possibility that the engine capacity augmentation can be done by way of bore-up without riding stroker .
To the top of the liner thickness , when measured using Sigmat to 3.5 mm ( Fig.1 ) . Moderate liner bottom is the same , measured 3.5 mm ( Fig.2 ) . Well , if you still want to retain the innate motorcycle cylinder boring , according to Beacon , racing team mechanic Stars Racing Team ( BRT ) in Cibinong , West Java , the standard boring dikorter still remaining until the minimum thickness of 1.5 mm .

" That meat was taken about 2 mm liner . Then 2 x 2 mm ( right + left side ) = 4 mm maximum magnification that can be used piston diameter than the standard , " says Beacon . In other words, the maximum dibore - ups can wear berdiemeter 62 mm pistons ( 58 mm pistons Byson standard ) . The capacity of the machine that will be obtained is 174.7 cc or 175 cc rounded so . Simply dong , that much !
But , further flare , just to be safe for daily use should be leaving around 2 mm thickness boring . This means that the cylinder liner meat turner about 1.5 mm . When multiplied by 2 mean maximum diameter of the cylindrical enlargement can be done only about 3 mm from the standard ( disposable piston 61 mm ) . Then the engine capacity 169.1 cc which will be obtained .
Meanwhile, if you want to bore-up more big again , inevitably cylinder liner must be replaced with more big anyway . Fortunately the distance between the bolt holes with a cylindrical outer lip liner is still quite a lot . Measured about 6.5 mm ( Fig.3 ) . So the cylinder block Byson can still crammed with more big boring .

" In theory anyway can use up to 70 mm diameter piston , " said Beacon . Because if we counted, said Suar , the distance between the lip liner lip cylinder to cylinder bolt hole nearest 3.5 mm means ( thick boring standard ) + 6.5 mm ( range outside lip to lip liner cylinder bolt hole ) = 10 mm .
For example the thickness of the meat between the cylinder block bolt holes with a replacement liner must disisain 2 mm ( weighing factor of durability) , and a thickness of 2 mm liner replacement spared as well , meaning enlargement of the diameter of the piston that can be done is 6 mm x 2 = 12 mm . In other words can be loaded with a maximum of 70 mm diameter piston . The capacity of the machine to be gained 222.7 cc , approaching kapaisitas Scorpio engine .
" But it depends on the thickness of the meat block and the bottom of the cylinder fins as well . Useless if it thick flesh but the bottom and thin fins , so not going to fit crammed boring too big . Additionally , wear of piston diameter is too big but the spec crutches asnya matching baseball , especially the pendulum weight , engine torque is not going to get out the maximum . enough I think maximum 66 mm piston wear alone ( so 198 cc ) , "suggested Teddy .
Fortunately Byson choice for many big piston , lo . Because the diameter of the piston pin Byson just like Mio , which is 15 mm . So you can use an aftermarket piston big bore- ups for the Mio .