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by andrew zac
Sat Aug 03, 2019 3:36 am
Forum: Four stroke
Topic: Nh 350
Replies: 21
Views: 4769

Re: Nh 350

350
by andrew zac
Sat Aug 03, 2019 3:35 am
Forum: Four stroke
Topic: Nh 350
Replies: 21
Views: 4769

Re: Nh 350

Corish
by andrew zac
Sat Feb 23, 2019 11:19 pm
Forum: Four stroke
Topic: broken VH 500 barrel
Replies: 4
Views: 827

Re: broken VH 500 barrel

i entered two bikes for the event and had team t shirts printed . we damaged both engines . i made the fatal mistake of gearing 255 bike so it did not pull in top past 5000 so my son held it flat in 3rd .i don't know where the rest of the piston is , i will remove the sump cover and was it all out w...
by andrew zac
Sat Feb 23, 2019 1:06 am
Forum: Four stroke
Topic: broken VH 500 barrel
Replies: 4
Views: 827

broken VH 500 barrel

this happened to my 500 . in racing last week end . does anybody have an alloy head and barrel i can consider purchasing . Photo on 23-02-2019 at 11.03 AM.jpg Photo on 23-02-2019 at 11.02 AM.jpg or alternatively a fix for the problem . i was changing gears at 7000 rpm going by my electronic taco . 9...
by andrew zac
Wed Oct 24, 2018 3:47 am
Forum: Four stroke
Topic: Oil pressure gauge fittings
Replies: 9
Views: 1740

Re: Speedomoter

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by andrew zac
Wed Oct 24, 2018 3:46 am
Forum: Four stroke
Topic: Oil pressure gauge fittings
Replies: 9
Views: 1740

Re: Oil pressure gauge fittings

Reproduced speedo
by andrew zac
Fri May 04, 2018 2:06 pm
Forum: Electrics
Topic: BTH COMPETITION MAGDYNO
Replies: 4
Views: 1441

Re: BTH COMPETITION MAGDYNO

ok Simon thanks for the reply . i am running H5 cam , 1.3/16 amal smooth bore , piston is a JP 9 to 1 hi comp . i am going to replace the gudgeon pin with a tapered one as it is a little lighter. i have other improvements in the pipeline as i begin to resemble thee complete bike in prep for the beac...
by andrew zac
Wed Apr 18, 2018 12:09 am
Forum: Electrics
Topic: BTH COMPETITION MAGDYNO
Replies: 4
Views: 1441

BTH COMPETITION MAGDYNO

Hi . to all , i have a new BTH competition magdyno fitted to my VH . i used it at SELLBACKS BEACH in 2017 . the motor, and the rest of the bike ,wheels,bearings,rims,etc .was completely rebuilt and prepared for the event , pre race testing at a remote beach location on a measured race distance allow...
by andrew zac
Fri Oct 07, 2016 1:52 am
Forum: Four stroke
Topic: exhaust length calculator
Replies: 7
Views: 2186

Re: exhaust length calculator

David ,thank you for your input . i will go with the 18 tooth sprocket and do some test runs . its a pain having to change sprockets once i have set it all up, i was trying to avoid that .(i can't find a suitable speed chart) . fuel is limited to service station pump from my reading the rules .il go...
by andrew zac
Thu Oct 06, 2016 5:53 am
Forum: Four stroke
Topic: exhaust length calculator
Replies: 7
Views: 2186

Re: exhaust length calculator

Hi Brenton. i have read your post on exhaust length calculators . however the link is no longer available . would you have another web link i could try. i am preparing a 1949 Ariel VH 500 for the sellicks beach race in feb 2017. any info on race set up for the sprints would be very helpful . i have ...

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