*Please note about the big bore kit Always use high-octane gasoline as fuel.
SP Takegawa is not able to answer the questions about insurance and bike registration.
*Notice about FI-CON 2 (Injection Controller) FI CON2 has been tested and confirmed to work only with bikes which is officially sold in Japan.We have not confirmed the compatibility with non-Japanese vehicles. For bikes equipped with SP Takegawa engine parts.Do not use in conjunction with engine parts made by other companies.Failure to do so may result in engine malfunction or failure. Please do not install aftermarket H.I.D kit or other company's LED headlight or fog lamp at the same time.Some ballasts / inverters (voltage conversion devices) emit high-voltage noise that adversely affects digital circuits, causing product failure or malfunction. Please do not install the headlight ON/OFF switch and the aftermarket ignition system at the same time.
*For 17T, the guard will interfere and cannot be installed. *Depending on the lot, the product may be delivered with the old price and label with the old JAN code before the price change.
You can enjoy the torque full output performance which is different from the stock engine.
■S Stage Big Bore Kit (Sports Camshaft Included) The S-stage Big Bore Kit uses the stock cylinder head as it is, and by simply replacing the cylinder and piston, you can increase the engine size to 81cc. By changing the stock engine from 50cc to 81cc, SP Takegawa's sports camshaft and FI-CON 2 (injection controller), the output performance is improved and the torque-full riding is realized. By installing SP Takegawa's exhaust at the same time, the output performance will be further improved.
Sports camshaft: The optimal profile of the camshaft maximizes the performance of the stock cylinder head and improves the power output.
■FI Controller 2 (Injection Controller) If you install engine parts such as big bore on an injected vehicle, the fuel balance will be out of tune. SP Takegawa's injection controller has a built-in 3D fuel map that is set up to match SP Takegawa's engine parts and can be set up according to the bike's specifications. You can easily change the settings by switching the rotary switch on the main unit, without the need for a PC. SP Takegawa's injection controller is capable of injecting more fuel than the stock computer can. In addition, the built-in correction map can be fine-tuned by using the rotary switch on the main unit. A special harness for each model is included, so it can be installed with minimum wiring work. It has a rev limiter cut function.
■Sprocket guard plate The Cross Cub 50 (AA06) has a guard plate on the front sprocket cover to prevent the drive chain from damaging the surrounding parts. When SP Takegawa's 15T / 16T drive sprocket is installed, this product is required because it cannot be installed due to interference with the stock guard plate.
■The tooth number of the stock drive sprocket is 13T. ■Steel drive sprocket: SP Takegawa drive sprockets are available in 5 types: 12T, 13T, 14T, 15T and 16T.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
I bought a CROSS CUB50 in 2020 and rode it for about a year, but I got sick of the 30km/h limit and the two-stage right turn, so I decided to get a regular motorcycle license and Bore up.
■Kit installation I did all the installation of the Parts by myself, but I felt that the replacement of the Sports Camshaft was a high hurdle for a beginner, so I forgot to replace the Camshaft this time. Although I felt that the Instruction Manual attached was explained in detail, I struggled a little because the process of removing the air cleaner and Throttle Body was omitted. As for this point, it is not included in the Instruction Manual. "Honda CROSS CUB/SUPER CUB Custom & Maintenance". It is recommended that you pre-purchase a book called My impression after doing all the Bore up work by myself is that if you can ask Shop, you should ask them…
About FI Controller 2 The FI Controller 2 settings should be fine as long as you follow the recommended settings as per the Instruction Manual, but when I was riding with the fuel injection set to the recommended setting +1, the Engine warning light came on while driving. I had it inspected at the shop and they diagnosed that the warning light came on due to thick fuel injection. If there is no particular reason to do so, we recommend that you start with the recommended settings as described in the Instruction Manual.
Fuel consumption This is the fuel consumption calculation at the point when it has only run about 50km after Bore up, but the fuel consumption was better than before Bore up! (About 80km/L, 70km/L when I refueled before that) The calculation result is based on the mileage of 100km before Bore up and 50km after Bore up, so I think it is not accurate, but still, I don't think you have to worry about the fuel consumption drop.
■Vibration The vibration is more than 50cc, but at low speed, I feel there is not much difference. When driving at high speed, the vibration will be reasonably strong, so driving for a long time may be more tiring.
I can't evaluate the durability at this point, but overall, the Bore Up Kit made by Mukawa is very good, so I don't feel too worried about it.View Detail
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