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Open for business - We are open and continuing to dispatch goods during the COVID-19 crisis - MORE INFO...
Our recommendations are for a 75KG rider racing motocross.
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CRF250R |
KX250F |
RMZ250 |
YZ250F |
KTM 250SXF |
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Standard |
Recommended |
Standard |
Recommended |
Standard |
Recommended |
Standard |
Recommended |
Standard |
Recommended |
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Front tyre |
Dunlop 742FA |
B'stone M403 |
B'stone M403 |
B'stone M403 |
|
B'stone M403 |
B'stone M403 |
B'stone M403 |
B'stone M70 |
B'stone M403 |
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Rear tyre |
Dunlop 756 |
B'stone M404 |
B'stone M404 |
B'stone M404 |
|
B'stone M404 |
B'stone M404 |
B'stone M404 |
B'stone M50 |
B'stone M404 |
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Gearing |
13/51 |
|
13/48 |
|
12/48 |
13/52 |
13/51 |
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13/48 |
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Fork height |
Flush |
5mm |
8mm |
8mm |
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|
5mm |
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Comp clicks |
12 |
12 |
6 |
10 |
10 |
14 |
9 |
|
12 |
22 |
|
Rebound clicks |
12 |
12 |
12 |
12 |
14 |
14 |
10 |
|
20 |
12 |
|
Fork spring rate |
0.46kg/mm |
0.44kg/mm |
0.45kg/mm |
0.44kg/mm |
0.44kg/mm |
0.44kg/mm |
0.46kg/mm |
0.44kg/mm |
0.45kg/mm |
0.44kg/mm |
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oil capacity |
360cc |
350cc |
360cc |
360cc |
360cc |
360cc |
350cc |
360cc |
360cc |
360cc |
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Shock spring rate |
5.3kg/mm |
4.8kg/mm |
5.1kg/mm |
4.8kg/mm |
5.4kg/mm |
5.0kg/mm |
5.3kg/mm |
4.8kg/mm |
69Nm |
Progressive D |
|
comp clicks |
14 |
12 |
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|
11 |
|
9 |
|
15 |
23 |
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HSC clicks |
3 turns |
2 |
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|
2 T |
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1.5T |
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|
|
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rebound clicks |
9 |
9 |
|
|
5 |
|
8 |
|
22 |
20 |
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sag height suggested |
100mm |
100mm |
100mm |
100mm is critical |
100mm |
100mm |
100mm |
100mm |
110mm |
113-118mm |
|
static sag suggested |
35mm |
35mm |
100mm |
35mm |
35mm |
35mm |
35mm |
35mm |
35mm |
35mm |
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Jetting |
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Fuel screw |
1.5 turns |
|
2 turns |
2 turns |
2 turns |
2 turns |
2 1/4 |
2 1/4 |
1.5 |
1.5 |
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Pilot jet |
42 |
40 |
40 |
42 |
42 |
42 |
45 |
45 |
40 |
42 |
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Main jet |
178 |
172 |
182 |
178 |
170 |
170 |
178 |
178 |
175 |
178 |
|
Needle |
NMTU |
NMTU |
NHJT |
NCYS |
NLDT |
NLDT |
NFLR5 |
NFLR5 |
OBEKP |
OBEKP |
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clip# |
#3 |
#3 |
#4 |
#3 |
#4 |
#4 |
#4 |
#4 |
#4 |
#4 |
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wire pump Y/N |
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No |
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Yes |
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Yes |
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No |
|
Yes |
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Leak jet |
70 |
65 |
55 |
60 |
45 |
55 |
70 |
60 |
50 |
50 |
|
Notes |
New cylinder head for 09 with different porting and valve seats. Rear spring losses free height quickly. |
23.5mm offset triple clamps for 2009. Best results are with 22mm offset clamps. Rear spring rate selection and sag heights are crucial, 100mm sag must kept. |
Rear shock stock setting does not have enough rebound dampening for many riders, same setting as 2008. Needs a pipe. Stock 12 tooth front sprocket wears chain guides. |
42 Pilot can be used at altitude. Convert engine to wet sump if clutch life is short. Needs a pipe. |
20mm offset is standard on the 2 way adjustable clamps. Fork and shock settings are too stiff for most riders, hence the clicker settings. |
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