Search found 124 matches

by 70sbikes
24 Jul 2025 06:08
Forum: Tre e mezzo
Topic: 1977 350 Sport Battery
Replies: 7
Views: 360

Re: 1977 350 Sport Battery

These have served me well over the years

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by 70sbikes
12 Jul 2025 12:15
Forum: Tre e mezzo
Topic: Transducers
Replies: 6
Views: 463

Re: Transducers

would it be possible to call you in a couple of months for any info i need
That might be tricky as I'm in Australia!
by 70sbikes
10 Jul 2025 02:58
Forum: Tre e mezzo
Topic: Transducers
Replies: 6
Views: 463

Re: Transducers

You are lucky enough to have the original pick up as the NLM one can be a difficult thing to set up I've had the NLM pick up fitted for years. It's not that hard to set it up. I find using a piece of paper to set the gap is the way to go (you can't use standard feeler gauges because of the magnets)...
by 70sbikes
05 Jul 2025 05:39
Forum: Tre e mezzo
Topic: Mirror Mount
Replies: 6
Views: 409

Re: Mirror Mount

I recently bought a "GP Clutch Lever Mount 7/8" front brake perch for my 3 1/2 Sport from 4into1motorcycleparts on eBay (because the action is so much better than the Morini original). I complimented this with an alloy mirror mount from AliExpress. Some nice AliExpress 10cm stainless mirro...
by 70sbikes
18 Jun 2025 05:20
Forum: Tre e mezzo
Topic: low to mid range flat spot
Replies: 48
Views: 1665

Re: low to mid range flat spot

What model are they please VM28's (probably a bit bigger than necessary, but re-jetting isn't that difficult). You also need the "top hat" type plastic/metal insert that goes into the carburetor mouth to allow them to be mounted to the standard Morini rubbers (I bought aluminium ones from...
by 70sbikes
17 Jun 2025 01:17
Forum: Tre e mezzo
Topic: low to mid range flat spot
Replies: 48
Views: 1665

Re: low to mid range flat spot

Didn’t really want to go to the expense of that really, I guess it’s new cables as well ? Yes, home-made cables using Sturmey Archer three speed bicycle bits. I struggled for years trying to tune the Dellorto square slide carburetors. The Mikuni carburetors took a little while to get right, but onc...
by 70sbikes
16 Jun 2025 12:39
Forum: Tre e mezzo
Topic: low to mid range flat spot
Replies: 48
Views: 1665

Re: low to mid range flat spot

Mikuni's!

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by 70sbikes
09 Jun 2025 00:51
Forum: Tre e mezzo
Topic: 1983 31/2 master cylinder
Replies: 18
Views: 782

Re: 1983 31/2 master cylinder

A cheap master cylinder from AliExpress works very well indeed (their braded steel brake lines are good too!)

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by 70sbikes
23 May 2025 00:16
Forum: Bikes and bits wanted
Topic: Raised Clip ons
Replies: 6
Views: 463

Re: Raised Clip ons

Barleycorn Engineering do them in stainless steel...
A vast improvement!

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by 70sbikes
26 Apr 2025 05:50
Forum: Tre e mezzo
Topic: Front Indicators
Replies: 5
Views: 2130

Re: Front Indicators

Just to add my $0.02 worth - the indicators have provision for an earth wire - I highly recommend utilizing this

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Trevor
by 70sbikes
17 Mar 2025 00:25
Forum: Tre e mezzo
Topic: Engine Oil
Replies: 13
Views: 6056

Re: Engine Oil

I use Penrite MC4ST 20W-50 motorcycle premium mineral oil. It has "FULL ZINC MAXIMUM PROTECTION". My 1979 Honda CBX gearbox is the smoothest it's ever been with this oil. I noticed other oils I had used for years steadily reduced their zinc levels.
by 70sbikes
26 Feb 2025 06:33
Forum: Tre e mezzo
Topic: Low compression 3 1/2
Replies: 46
Views: 21598

Re: Low compression 3 1/2

https://live.staticflickr.com/65535/54351811573_e4c98b2362_c.jpg https://live.staticflickr.com/65535/54351585231_715df30f5e_c.jpg https://live.staticflickr.com/65535/54350699872_1f735615f4_c.jpg Here's the "washer" I got from Ralph Restorations (which seems to have disappeared off the int...
by 70sbikes
20 Nov 2024 10:51
Forum: Tre e mezzo
Topic: indicator / light switch
Replies: 7
Views: 4530

Re: indicator / light switch

https://www.ebay.com/itm/174533099005?fits=Model%3AGT80%7CMake%3AYamaha&_skw=Yamaha+GT80+1978-79+FS1+DX+FS1DX+Holder+Switch+Turn+Signal+Dimmer+Light+Horn+LH&itmmeta=01JD4K2EKVCF682F26C3XPCC06&hash=item28a2fbbdfd:g:QoYAAOSw2V5fvfnF&itmprp=enc%3AAQAJAAABMHoV3kP08IDx%2BKZ9MfhVJKl6XT4HOB...
by 70sbikes
28 Oct 2024 02:02
Forum: Tre e mezzo
Topic: Clutch question
Replies: 49
Views: 26304

Re: Clutch question

When I was rebuilding the engine on my '76 3 1/2 Sport I broke the clutch basket and had to buy a whole 2nd hand clutch from Germany. So, I have a few spare steel plates. If you PM me your address I'll pop it in the post. It may take a little while to arrive, because I'm in Australia... Trevor https...
by 70sbikes
26 Oct 2024 04:20
Forum: Tre e mezzo
Topic: Clutch question
Replies: 49
Views: 26304

Re: Clutch question

The replacement cables I have bought have ALL had an inner that was too long. This is my solution: https://live.staticflickr.com/65535/52261656862_3ebba2ec3a_c.jpg It's a long aluminium cap head screw, with the centre drilled and a slot made with a Dremel. I also have one of these on my Honda CB350 ...