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 the new Sherco 125 fourstroke trials 150cc 57.5mm bore

(Same bore size as early 175CC scorpa 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 

This is a OE spec cylinder relined and bored to 150cc patterned modified in the uk 150 piston kit and oversize gaskets 

everything in the photo you receive 

unlike other sellers on ebay we have a 1 mm oversize piston availible for when you need a rebore  and oversize gasket sets 

You can buy with confidence from a UK company modifying these big bore kits in the UK 

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 

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