Kit 150cc Ø57,4mm AIRSAL, cylinder / piston for motorcycle YAMAHA YBR, XT R, XT X, RIEJU MRT, TANGO, RS2, DERBI SENDA 125cc

Ideal in combination with a sport exhaust like the TURBOKIT and a gearbox output pinion with a tooth or two more as well as a good colder racing spark plug CR7HIX (SUMMER) or CR6HIX (WINTER), here is the 150cc AIRSAL kit! It mounts on injection engines like a carburetor! A 28 to 30mm carburetor can also accompany the beast but the origin is also suitable (we recommend increasing the main jet all the same to properly adjust the air / fuel ratio, during your adjustments, you can use the AFR POLINI to point the right AFR of 13 so have good performance without worrying about running too lean ). You should know that the YAMAHA engine equips a lot of motorcycles, but the RIEJUs work harder than the YAMAHAs! YAMAHAs are often equipped with a Ø20mm MIKUNI carburetor while RIEJUs have 26mm (VM26SS from MIKUNI). This is why with such a kit, a good carburettor of Ø28 to 30mm in DELLORTO PHF or PHBH can be exploited! The injection engines, they will correct the richness on their own thanks to the carthography and the lambda sensors.

 

 

Its diameter of 57.4mm takes you from 125cc to 150cc real torque and power. The original cylinder head and crankshaft can be preserved without problems! This kit comes complete with piston, seals, segments, axle, clips ... Very good quality, made in Spain! Mounts on YBR, XT R and XT X from YAMAHA, 4T 125cc air cooled engine mounted on many other 125cc motorcycles. The compression ratio is also greatly increased for more torque and power, use only SP98, more SP95.

 

 

Original power on an XT-R or XT-X 125cc :

12.5hp at 8000rpm up to 11,500 rpm

12nm at 5500rpm

Stroke 54mm / piston diameter 54mm: 125cc

Carburetor origin Ø20mm

 

(the versions like the RIEJU RS2, MARATHON ... come out of origin 13 to 15hp because they have a more compressed engine and a larger carburetor, generally Ø24 to 26mm like VM26SS from MIKUNI)

 

Performances that can be obtained with 150cc kit, exhaust line ... :

 

15.5 to 18.5hp from 7500rpm up to 12,000 / 13,000rpm

15.5nm from 4500rpm

Highly increased compression ratio, only SP98 should be used

Stroke 54mm / Ø piston 57.4mm: 140cc real

Carburetor Ø25 to 30mm recommended, if you reschedule / have the cylinder head rectified, have 0.30mm removed for more compression! You can touch up and improve (remove defects or what prevents the passage) slightly the intake and exhaust duct, by polishing for the latter! Exhaust line without catalyst and sport filter which breathes well recommended!

 

As you can see, horsepower and torque are available earlier!

Mounts on 154FMI engines:

YAMAHA YBR 125cc

YAMAHA TTR 125cc

YAMAHA XT X 125cc

YAMAHA XT R 125cc

YAMAHA YFM RAPTOR 125

RIEJU RS2 125cc

RIEJU SMX 125cc

RIEJU MARATHON 125cc

RIEJU MRT 125cc

RIEJU TANGO

MOTORHISPANIA MH7 125cc

MOTORHISPANIA DUNA 125cc

 

SHERCO CITY CORP 125cc

 

SCORPA TY SF TRIAL

GASGAS Trial Randonné 125cc

GASGAS PAMPERA 125cc

 

PEUGEOT XPS 125cc

 

DERBI SENDA 125cc

 

BETA RR 125 and other air models

 

ORCAL ASTOR 125 (to be checked before purchase)

 

HUSQVARNA WSM CH RACING 125 4T

CH RACING 125 4T

 

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