We are a Uk ltd company est 1972 we aim for next day delivery when poss
All the items we list are in stock ready for immediate despatch
This kit has a specially modified piston in it to ensure correct valve clearance is maintained
With you using your 125 cc cylinder head piston will not catch on head or crank due to oversize
Here we have a Big bore kit for YBR125 TO 150CC WITHOUT HASSLE STRAIGHT FIT AND ALL OE YAMAHA PARTS SO BEST QUALITY MONEY CAN BUY
bore size 57.5mm
big increase ,Please check the photo the kit you see in the photo is the kit you get ,
gives you a hell of a difference makes hill climbs easy pulls 1 gear higher everywhere ,
straight fit kit no mods to do just fit back as old 125 came of and your done 25 more cc
Comes with full fitting instructions if you want we can post or email them just let us know
This is a OE yamaha 150 cylinder, japanese TKR racing 150 piston kit and 150 Yamaha oversize gaskets set
The actual parts in the photo you will receive or your money back
unlike other sellers on ebay we have a 1 mm oversize piston availible for when you need a rebore and oversize gasket sets
1 x OE YAMAHA 57.5mm alloy cylinder with 60mm od linner
1 x JAPANESE 57.5mm piston TKR HIGH COMP
1 X JAPANESE 57.5mm piston rings
1 x JAPANESE gudgeon pin
2 x JAPANESE clips
1 x OE YAMAHA gasket set all gaskets needed 1 x head gasket 2 x base thick and thin , timing chain gasket ,
for best results
(fit both thick and thin base gaskets supplied ) gives correct compression and valve clearance
You can buy with confidence from a UK company big bore kits in the UK
MADE TO BE STRAIGHT FIT WITHOUT HASLE ,ALLWAYS AT THE END OF A PHONE FOR ADVICE ETC. AND FOR FURTURE SINGLE ITEMS GASKETS OVERSIZE PISTONS ETC
delivering from the UK
CARRYING STOCK IN UK
UNLIKE MANY OTHERS ON HERE
Delivering to your door within 2 days
AVT AUTOPARTS ltd
82/84shields road
Byker
Newcastle upon Tyne
Ne61ds
Tel 07773070793 Colin lee
No76 Skye Adams flat track racer seen in last two photos who runs our kit on her bike Part of berlt racing team Showing the boy's the way with some girl power 😂😂😂👍👍🏁🏁 Go on syke you show them
IMPORTANT BERLT BIGBORE KITS ARE FOR COMPETITION USE ONLY
TRACK DAYS / DIRT RACING/ CLOSED CIRCUIT RACING ONLY
NOT SUITABLE FOR ROAD USE DUE TO HIGHLY TUNED NATURE