Відео

Not much difference apart from quicker reving

​@@brucegordon4934thing is tits mate🤙

@@brucegordon4934 did you bend that header to fit? Is that the hrp performance pipes for honda atcs?

Hi Ken 24mm for modified engine if your keeping the internals stock wouldn't go over 22mm and with a proformance pipe

posh digital adjustable mapping for XR00

No mate old school lightened crank from the 70s and a 54mm high comp piston and a 35/36 web cam all old school race stuff only modern bit is the posh digital ignition and yogi flat slide carby

so the original swing arm was a Franks racing product idea and my dad built it off drawings from Kelvin Franks in the 70s one off as I haven't seen or know of any more when I went to restore the bike the old swing arm was rusted and a bit rough in its appearance as my dad did all the fabrication so instead I search for a close fit and modified the alloy one to fit its originally off a 125cc pit bike but needed alot of tig work to make it fit but handles well and holds my 90 kgs

Done in Australia early Kelvin Frank's Racing design swing arm mid 70s

lightened crankshaft digital ignition 54mm forged high comp piston 1mm bigger inlet valve big port job on head and flow tested shorter bronze guides heavy duty valve springs and titiaum caps and retainers web cam 38b38c 24mm flat slide yoshimura modified carby and custom intake manifold old school PK exhaust barnet kevlar clutch pack and alot of putting together pulling apart and checking and blueprinting so nothing hits inside on overrev

Hi Jacob built it myself 54mm high comp piston, ported head work, bigger inlet valve ,web cam, 24mm mikuni flat slide, custom intake, lighten crank, digital duel map ignition, home made exhaust

@@brucegordon4934 you have some serious $ into this thing!

all work done by me as im a engine builder and a lot of the parts i had as i use to race these bikes as a kid,rims and s/steel spokes probably cost me the most,k will be racing it in the mini master series this year in the Vintage Viper club here in melbourne Australia just as fast as a old school YZ80,CR80,KX80

antonio Huerta hi I am engine builder by trade 120cc kit high comp forged piston 14:1 compression running 120 octane leaded fuel lightened crank PVL ignition barnet kevlar clutch pack 26mm flat slide mikuni carby a lot of head work and bigger valves Takegawa sx35 cam oil cooler fitted with oil supply straight to cam journals custom intake manifold and a lot of engine blueprinting to make sure all clearances and tolerances are right so at high rpm it doesn't fail

Ok thanks could you do a ride on it

Bruce Gordon would a 120 kit fit on xr80r

antonio Huerta no mate xr80 has wrong stroke you can fit 120 kit on xr75 with some case boring only option for xr 80 is using high comp piston from cb400 honda if I remember right comp height and 13mm pin limited options on 80 model

check in the comments cheers

ditto - love the snarl

home made using BBR XR100 spring

have a look above in comments cheers engine builder by trade built and modified engine myself

original powerrol stoker bottom end from when i raced this bike back in the 70s 54mm piston late model takegawa roller cam roller rocker head machined to fit the early bottom end PVL ignition 120cc pop Yosimura 24mm flatslide carby

check in the comments cheers