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Diamo Velux discussion forum:RE: tuning |
| RE: tuning |
| Vyndarlys said 2005-09-11 08:57 |
| We seem to like the bike for much the same reasons... Right, and I dont want to completely dispell the attainment of more CCs, through big bore kits or what have you, but interestingly, much like cc size, it is not necesary to increase HP output to bring a scooter better into tune. Many times, with a CVTransmission the problem isnt really so much needing more HP as needing the best possible output at the right levels for the time and task... Often airbox and exaust modifications can help the engine better ´breathe´ so as to allow for more of the engine´s power to go to the drive... Indeed, one of the main places restrictors can be found are allong those pathways in the engine. Often 50ccs, I need not point out, can have various washers or other constricting the flow to slow the engine... Other places Ive found restriction is in the variator of the CVT. Still others are found in the electrics of the bike... Therefore, to get more torque, as I seek to do, I do not need to look for HP exactly, or adding ccs, but look to better adjust the setup of the CVT. It is the CVT that makes scooters so uncommon and also allows for use of smaller cc sizes as it is unique among bikes in that, if properly tuned, it allows for the engine to operate at peak output constantly and for the transmission to deliver the full output of the engine to the drive at all speeds. Geared bikes, on the other hand, have set ratios for their operation and the engine Rpm´s move around to suit those ratios. From first gear to second one has to run the engine at a fast rpm, building a momentum to carry the bike while shifting and then continue it at an acceptable speed into the second ratio... Because of this variation of Rpm, the engines function at various levels of eficiency and output. Also, the need to amass this cushon of momentum for shifting requires use of more HP than would be necesary otherwise. The scooter´s use of the engine running singularly at the best RPM and the further variation of the transmission in infinite gear ratios to suit that output means that a well tuned scooter provides consistent force at any speed. Having no need to shift, the scooter can provide the steady HP of the engine constantly to whatever speed you travel at to accelerate. Tuning the scooter is, then, a matter of conforming the range and ammounts of change in that ratio profile to best fit your situation. A scooter can then be given more torque by setting the CVT to move more slowly from a low ratio to a high one... Cutting top speed perhaps, but gaining a more steady output in the low to mid ranges... and gaining useable power in the process. By retuning the CVT and eventually getting a new exaust and airbox modifications done, as well as generall things like better belts, and tires, one can use a scooter with relatively few HP to great effect... Vyn PS, I heard they were like 9.something HP...? PPS, mechanics get paid for labor mind, often parts can be bought and the work done yourself if you have knowledgeable people around to help out... One good thing about it, the scooter engines are nice and simplistic as far as engines go... ----ANY OWNERS HAVE REVIEWS OF THE BIKE TO SHARE??????----- (for those of us who are working on getting ours) |
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