Riset Kelas 175 CC
To enliven the racing 175 cc class skubek open, aka Saputra Eksa Medi Medi Speed of getting ready early. Get ready ...!
Tuner from Jl. Harsono RM, Ragunan, South Jakarta was trying to use Tiger piston diameter of 63.5 mm obtained easily. However, increased engine capacity was 183.3 cc. Well, violating regulations dong?
In research, Medi not want to admit responsibility. Because of this new class and get off at the circuit design unknown treknya, he makes two models of the engine. Like the standard model of the dome design and a bathtub.
Two models were intended to look for better performance. Thus, the team was able to modify the appropriate data and do not need to touch on the circuit.
As a test, the cylinder block in the content Mio Honda New Tiger piston diameter of 63.5 mm. Incidentally the same diameter while the piston pen to change the piston head. Also changed gedein hole boring and crank-case of a 61 mm 69 mm.
Later when I met settings, replace the piston according to regulation 175 cc class. He said disposable piston Honda GL-Pro 62 mm diameter platinum. The result was the volume of a cylinder 174.7 cc, "explained the father of this child.
Because Medi dome makes two models, automatic piston head in two blocks necessary adjustments. As usual dome model, so do the trimming 12,5:1 compression outer ring around the piston head 0.5 mm. To form a circle 54 mm in diameter. Dome was a bathtub, his head circumference dipapas by leaving a 0.8 mm diameter circle in 52 mm.
"Because the dome is different from usual model dome bathtub models, no doubt on the corner of the dome valve boss bathtub I slide into. Problem degree secret. To be sure, the rest of the distance between the valve settings in and out in the dome of about 0.5 mm to avoid collisions when they overlap, "said Medi.
For the supply of fuel because the cylinder was distended, the pinnacle of the standard back changed. Just about the duration or the duration of the valve in and out open-close, again dirahasikan Medi. Wah ya cheapskate?
Just as a benchmark, Medi admitted that back for a high dome ridge in the bathtub dipapas be 26 mm by 19 mm thick waist. Out back was the pinnacle height 25 mm and 18 mm thick waist. It seems too after a lap top.
DATA MODIFICATION
Front tire: Indotire 80/90x14
Rear tire: Indotire 80/90x14
CDI: I-Max BRT
Houses roller: 13 degrees
Ratio: 14/40
Teremol: TKM
Rim: 1.40-14 Camp
Sok back: YSS
Writer / Photo: Kris / Bela, Boyo
Long Stroke 173,5 cc
One more but not from Mayora! But preparations for the jump in the 175 cc class, has done Komeng Deny alias Mansur. Doi, mechanical Motor Clinic (CM). This time, Yamaha's Sandy seriously worked to jump on a new class racing skubek.
"Research continues deh, while this class has not rolled it," said Komeng which to carry the flag of the class Petshop FT Youmbla Clinic (YPFTC).
Well, there was some research done Komeng. If anything, the process is done on an intercross engine tuh. Yes, intercrosses between two brands of manufacturers.
Confused? No! Continue reading until they run out deh. Starting from the first intercross yes! By increasing the capacity of the cylinder to firmly touch the 175 cc class, Deny raising measures about 10 mm pistons. Dilakoni to pursue it for a longer stroke.
"Naikinnya, use a pen stroke Kawahara 5 mm. Just that alone, enggak need big slide end," said the young man's heart good. Lho kok youth? Yeah, right Komeng unmarried. Hi .. hi .. hi ...
Go! With pen method, now measures 67.9 mm piston so. Iya dong, up and down adds a 10 mm. Mio original stroke plus a 57.9 mm, 67.9 mm dong so. Begitunya increase was accompanied by an increase in stroke piston diameter. Yes, the piston is taken from the 125 oversized Suzuki Thunder 0. "Use size 57 mm," said Komeng who had a workshop on Jl. Squadron, No. 14, Halim, East Jakarta.
Now the cylinder capacity of 173.5 cc so swollen. But there are adjustments made for wearing the piston Komeng's Thunder. Doi, kudu handlebars replace the standard piston Jupiter MX 135 has a pin hole 14 mm sehernya with Thunder 125.
"MX handlebars of the piston is longer than Mio. Also if not replaced, the piston can be fixed pen with crutches as the Ttitik Dead Down (TMB)," he said. This is practically intercross.
Adjusting the diameter of the piston which is only 57 mm, valve EE brands that had a size of 31.5 mm and 25.5 mm dipapas join. The diameter of the umbrella valve gambot so dipapas for valves 28 mm and 24 mm in valve for waste. In order to bejaban on the short track.
Now, with open-close valve is originally from the Toyota Vios in Thailand, the noken alias as well as play back duration. Unfortunately, Komeng enggak really know about the duration.
"But clearly, bumbungan valve into the valve and dispose of this K3 type Kawahara dipapas about 0.5 mm," said Deny is pleased with cropped haircuts.
Machine capabilities Begitunya rely almost overstroke characters. Well, I think under fierce round ya?
DATA MODIFICATION
Tires: Indotire 80/90-14
Carburetor: Keihin PE 28 mm
Sokbreker: YSS
Exhaust: Kawahara
CDI: BRT i-Max
Pilot jet: 45
Main-jet: 120
Motor Clinic: (021) 9222-7006
Writer / Photo: Eka / Boyo
Yamaha Crypton engine's Great or Bamboo Shoots nicknamed it has a capacity of 261 cc. Got a match unbeaten record in the race 600 meters kebut night. Of the nine times appear, all opponents of clean brushed motor this geberan Faril.
Play in Tangerang, Jakarta until Cianjur, many nyesel ajakin own but finally after fighting the Bamboo Shoots, "said Alfin, Sha-Sha owner Motor (S2M), which mix the given name besutan as the owner's nickname.
According to Alfin, korekan applied fairly simple. No special technology is applied. The most mah up Most stroke and bore up doangan," I Alfin original Betawi and shop located on Jl. Raya Jombang, No. 7, Masjid Lama, Tangerang, Banten.
Bore up! The goal, larger cylinder capacity. Begitunya expected more out of a big power. More solid, piston-owned Yamaha Scorpio 70 mm in diameter on the block pairs of Jupiter. Then, the method also rose dilakoni stroke. Nah need to slide the big end, but the father of 6 year berputri route pen stroke applications.
"Put the pen stroke of 5 mm. Kan total rise and fall of a 10 mm. That was enough kok. If excess fear not strong," said 30 year mechanic. The more stable again, although it does not affect the stroke, but the handlebars of the piston part replaced.
Disposable piston's handlebars Yamaha RX-Z which is longer than Yamaha's Jupiter. Lho kok Jupiter again? Yes, use crutches taunya Alfin-tuh as Jupiter's. The total volume of 261 cc cylinders now.
Oh ya! There is one more locks Alfin applied for this motor. Namely, booster ignition diraciknya own. "CDI remains the standard. Use this booster, make a cleaner burning. One time pull or gases, combustion certainly fits. No dry not too wet," said the plan would Alfin mass producing the booster.
Brush!
DATA MODIFICATION
Tires: FDR 70/90-17
Rim: TK
Kanlpot: SKR
Airs next: YSS
S2M: (021) 94,353,653
Writer / Photo: Eka / David
