no worrys sorry its not the zoomer one but i cant find that one anywhere!

Cool!!!, you beat me to it on the Cygnus swap.

With regards to DVLA and engine swaps, there are parts of the V5 that you fill in with new engine number and cc. Along with the amended V5, the DVLA need/prefer a letter from a garage/mechanic to verify the work/changes and give thumbs-up on roadworthyness.

I made the mechanic's letter up and asked a friend (mechanic) if I could put his name to it, wrote some waffle about engine swap been more cost efficient than repair to stock. Documents took about 3 weeks, then bingo 100cc road legal Zoomer.

Does your new motor have a standard carburetor, or is it PGM-FI? Do you have the Cygnus loom?

Good luck man, looks like you have some of the toughest bits sorted already.

Cheers Bandaar, I was worried that i would have to go down the route of reregistering I am not keen on having a Q plate.

The engine is fuel injected and i was lucky enough the find a really great scrap that were very helpful. They sent the whole engine with the loom and the everything attached. I am hoping it is just a case of just marrying up the wiring.

I am already thinking of further mods to the Cygnus engine. A Sport Variator and big bore kit are all available as well as duel exhausts. First things first though, i think that if all goes well i may be able to get a ride out of it this weekend.

Isn't there a wire diagram in the back of your owners manual..?

is there? ive been lazy and havnt bought one yet i never got one with my zoomer, will have to get one soon its almost spray time and i need the torque settings for the main frame bolts

Do you follow all those settings? I always do things by hand but thats just me..
Anyway, if we mean the same thing then yes there is, the little book that is supposed to be in your under seat compartment.

phoned honda today and ordered one, most of the time i torque it, depends how important it is

Dave555, cheers for this link but the diagram is deffo not for a UK Zoomer. Nothing matches up, if this is a ruckus diagram i am shocked that there is such a diference.

Anyway, does anyone have the correct wiring diagram? There is nothing in the handbook as was previously suggested. I would really appreciate some help with this one cus i am stuck until i get one.

Cheers

what are you using from the zoomer harness? it might be easier just to use the donor harness for everything, lights, same battery, starter, literly get rid of all the zoomer wiring and ecu and replace with the donor one. what are you doin about the fuel tank are you using the stock one? not sure if its guna work unless the donor is also FI? well interested to see how this works out il keep my eyes peeled for a wiring diagram and pm you straight away if i find one

Hi Dave,

I am mostly using the Cygnus wiring as much as possible but some of the it is not quite as easy as to say just get rid of the zoomer wiring all together. I am trying to keep the stock tank and fuel pump (This is actually most of the problem i am having with the wiring). Yes the Cygnus is FI my only initial concern with reusing the tank is if the pump is strong ebnough to fuel a 125 engine (and potentially a big more kit in time). I have found a cygnus wiring diagram but am still looking for the Zoomer one. I am going to call Honda today.

Once i get this done i wil post my working and all the diagrams so that potentially others can follow suit but it it is deffo not for the beginner!!.

I have the uk wiring diagram, and if u give me your email I'll send you a jpeg.

Hello there,

Does the Cygnus FI engine supply take fuel from an in-tank pump like the Zoomer?

Have been in to a Yamaha garage to check the parts-fiche images? Maybe ask for a copy of the engine/fuel system parts/pages, it may help to figure out how to make it work.

Can you post an image of the Cygnus wiring diagram?

There are some good pics of Sekizawa-san working on the nice white Cygnus swap in the T-Parts blog:

http://tokyoparts.blog18.fc2.com/blog-date-200905.html



Is this the same carburetor as yours?

Hi Bandaar,

The Cygnus does indeed have a in-tank pump. I have ordered the service manual off the net for the Yamaha. I will post the whole thing when i have it.

Just a quick picture of my progress. Only the wiring to go now. Thanks to Beatbop who has found me a wiring diagram I should be sorted this weekend. Obviously i cannot take it far as i am not going to be strictly legal and i think that the cops are going to take alot of notice of me on this thing.



I am looking forward to being able to ride the thing this weekend. I am interested in how it is going to handle. Just moving it around my garden i can tell that the the turning circle is massive (comparatively).

I am also a bit worried about the very long stretch now between the front and back wheel. I have seen these frame braces that are simply a pole that comes from the headstock (or there abouts) and attach to near the seat. Has anyone seen these for sale anywhere?