Reference: S410485303003
Replacement exhaust valve kit 170cc ATHENA engine 4FU (derbi gpr / yamaha tzr / tdr / dt ..)
Ideal for a single replacement in case of breakage.
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For those looking to gain torque, acceleration, power and speed while preserving maximum strength on their motorcycle :
YAMAHA DT 125 2T
YAMAHA TDR 125 2T
YAMAHA DTRE 125 2T
YAMAHA DTX 125 2T
YAMAHA TZR 125 2T
KTM 125
GILERA SC 125 2T
DERBI GPR 125 2T
KTM LC2 / STING 125 2T
SACHS XTC 125 / ZX 125 2T
And many other machines. YAMAHA engine with valve only, cannot be mounted on MINARELLI engine ...
A very large high-end aluminum kit with nykasil treatment, with its 65mm diameter placed on your original 50.68mm stroke crankshaft, this cylinder will offer you no less than 168.17cc. The compression ratio is 13: 1 and the exhaust diagram 194 °.
ATHENA announces no less than 25.5 hp at 10,500 rpm at the wheel outlet on a fully original machine type TDR 125 and no less than 29.6 hp at 11,700 rpm at the wheel outlet on a machine type TZR R YAMAHA with overhead all a torque at 21 nm… enough to make more than a 125 rs drool… Especially since this kit preserves the valve for optimal torque despite the high diagram for power.
We think that the real 37 see 40 hp are largely achievable using an exhaust, carburetion… racing! On request and on the site, we already offer valves, racing exhaust ...
This kit has been really neat, started with a reworked exhaust valve, a cylinder head machined in the mass, completely revised and corrected ducts, a forged graphite piston, its bi segment and its valve will preserve a large torque while let appear very high speeds, more particularly thanks to their hard chrome treatment S10 and their bending. In short, really a must for this type of engine. We will appreciate the degree of finish that athena has applied to this engine. Yet the price is lower than an original cylinder ... According to ATHENA racing, the original crankshaft can amply support this cylinder.
This kit is delivered complete with :
Reinforced C-piston clips
High quality forged piston with graphite treatment
2 hard chrome domed segment S10
Reinforced piston pin
Reinforced cylinder head studs
Competition exhaust valve / valve
Machined cylinder head stud
Die-cast aluminum cylinder head cover
Seal and complete screws
Notice
Guarantee certificate
Stickers
...
We recommend with this minimum kit: 290 jet in the original MIKUNI carburetor , racing exhaust (ARROW, GIANNELLI, TURBOKIT, ATHENA, ...) and BOYESEN valve blades . For those who want more top speed, a +2 tooth pinion is strongly recommended (16 original so go to 18) . Note that a 30 to 34mm carburetor can be used.
As an option, we offer a stage 1 preparation, this preparation is a slight modification of the exhaust port by increasing the diagrams. Allow a little extra time for this preparation!
Reference: S410485303003
Ideal for a single replacement in case of breakage.
Reference: S410485316002
Racing segments, ideal for entering the 170cc ATHENA kit.
Reference: S4F06500002A
The replacement piston for your large ATHENA kits on TDR, DT, TZR ...
Reference: S410485308004
Ideal cylinder head cover in the event of impact, breakage... For a refurbishment guaranteed on your ATHENA Racing 125cc kit.
Reference: S410485315001
Ideal for in case of breakage, blockage, bad editing ...
Reference: P400485160005
Indispensable to refurbish the compression and engine sealing of your 170cc ATHENA Racing kit.
Reference: 63100.00
Kit right without cylinder head for your old RUMI Bi-cylinder 2T!
Reference: CI.01.141.G2
Upgraded version to 140cc for your motorcycle 125cc rotax engine 123 2 stroke! High-end aluminum cylinder, piston diameter 57mm BI-SEGMENTS with upwardly revised intake transfers, valve exhaust large diameter ...
Reference: 63120.00sx
Kit left complete with cylinder head for your old RUMI Bi-cylinder 2T!
Reference: CK.01.140.G2
140cc optimized version for your 125cc 2-stroke rotax 122 motor bike! High-end aluminum cylinder, two-segment piston diameter 57mm with upwardly revised intake transfers, large diameter valve exhaust ... cylinder head!
Reference: P400485100030
The famous BIG BORE 144cc from ATHENA for Yamaha YZ 125 - 2005/2018 motorcycles! Monstrous!
Reference: CI.01.140.G
Optimized version at 140cc for your motorcycle 125cc engine rotax 122 2 stroke! High-end aluminum cylinder, piston diameter 57mm with intake transfers review upward, valve exhaust large diameter ...
Reference: CIL-1041-S
Very good quality kit at a very low price for your YS 125 2T from 2005 to 2018!
Reference: CI.01.127.G
A radical solution to improve the performance of your motorcycle 125cc rotax 122 2 stroke engine! High quality aluminum cylinder, piston diameter 54mm mono-segments with studied transfer transfers and valve exhaust ...
Reference: P400250100011
The famous BIG BORE 144cc of ATHENA for KAWASAKI KW 125 2T from 2003 to 2007! Monstrous!
Reference: 63150.00
Set of two cylinders right and left for RUMI 125cc 2T era! Delivered without cylinder heads!
Reference: 107.0020
Ideal for giving performance to your old 125cc CAGIVA by refurbishing it!
Reference: CI.01.125.G
A unique solution to literally optimize the performance of your motorcycle 125cc rotax 122 2-stroke engine! The ITALKIT Sport version, high-end aluminum cylinder, piston diameter 54mm two-segment with studied intake transfers and valve exhaust ...
Reference: 107.0028
A real bully, the 165cc kit for your 125cc 2-stroke CAGIVA MITO, PLANET, RAPTOR ... With exhaust valve!
Reference: CK.01.140.G
Optimized version at 140cc for your 125cc motorcycle 2-stroke rotax 122 engine! High-end aluminum cylinder, 57mm diameter single-segment piston with intake transfers revised upwards, large diameter valve exhaust ... Supplied with stud cylinder head!
Reference: CI.01.128.G
A radical solution to improve the performance of your 125cc 2-stroke rotax 123 engine! High-end aluminum cylinder, 54mm diameter piston mono-segments with studied intake transfers and valve exhaust ...
Reference: 30140.00
Kit for motorcycles GUZZI ZIGOLO 1950/1960 ... 125cc 2T.