Sunstar, launched the “415 convert sprocket” for JP250
- 30/05/2016
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Sunstar to perform the planning, manufacturing and sales of sprocket/ brake disk, a new class JP250 dedicated from this year, released a 415-convert sprocket.
The effect of the 415-conversion, not only the weight of the sprocket, is a lightweight due to size down the chain of help to a large friction loss reduction, or the maximum speed is UP, or the acceleration is better, leading to improved fuel efficiency.
JP250 for 415 convert sprocket
It launched the 415-conversion sprocket of the new class “JP250” dedicated from this year.
When it comes to the CBR250R (MC41) the minimum number of teeth of the 44T (520 equivalent 35T of) for, astounding lightness, it has been achieved 96g. Of course there is no problem in strength.
The effect of the 415-conversion, not only the weight of the sprocket, lightweight due to size down the chain will help in a big friction loss reduction. This, or the maximum speed is UP, or the acceleration is better, leading to improved fuel economy.
Also compared with the size 520, by which the pitch between the chain link is shortened, the amount of change with respect to the sprocket 1T is small will allow a change of fine reduction ratio in accordance with the courses and how to ride (Final).
Configured for racing mainly perform frequent maintenance
520 converted from the size to 415 size, can this two-point change of friction loss reduction, fine final by and lighter is said to benefit. However, weight reduction and contradictory performance is durability. This is compared with the 520 size, the width of the chain becomes thin, and both of durability is lowered by even thinner thickness of the sprocket.
In order to maintain the benefits of the above two points, frequently chain maintenance is required. Doing chain maintenance in the sense of the 520 size, or have stretched unexpectedly chain, premature wear of the sprocket, worst chain fall off, leading to cutting.
Lubricate the chain cleaning, let’s check the chain pulling diligently.
Product Info
[Front sprocket]
CBR250R (MC41)
– part number: 004
– number of teeth: 17 ~ 18T
– Price: 3,500 yen + tax
[Webike shopping]
◆ CBR250R (MC41) 415 front sprocket for conversion product page
R25-YZF
-number: 003
– number of teeth: 16 ~ 18T
– Price: 3,500 yen + tax
[Webike shopping]
◆ YZF-R25 415 conversion for the front sprocket product page
Nijna250 / SL
– part number: 005
– number of teeth: 17 ~ 18T
– Price: 3,500 yen + tax
[Webike shopping]
◆ Nijna250 / SL 415 conversion for the front sprocket product page
[Rear sprocket]
CBR250R (MC41)
- part number: RH-124
- number of teeth: 44 ~ 49T
- Price: 8,000 yen + tax
[Webike shopping]
◆ CBR250R (MC41) 415 rear sprocket for conversion product page
-R25 · YZF Ninja250 / SL
-part number: RY-116
-number of teeth: 51 ~ 57T
-Price: 8,000 yen + tax
[Webike shopping]
◆ YZF-R25 · Ninja250 / SL 415 rear sprocket for conversion product page
※ rear sprocket, we have released.
※ front sprocket will be July and August will be in stock.
※ attached photograph is an image.
- Webike shopping SUNSTAR: Sunstar brand page
https://www.webike.net/brand/732/
Information provider [ SUNSTAR ]
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