(G) Best options for torque gains?

If funds were tight you could opt for the Punto 75 cam.

TBH, I don't think you could go far wrong with an allanhelen spec cinq.

I know, but I'm bored at work!!

Cheers

D

I'm reading this with interest as I want the same thing, top speed on the bog roads in Ireland is not an issue as dodging the ditches id more of a priority, I have on the other hand got access to a punto 75, all the bits of which are free !
I don't want to rip my engine out as it's only done 50k and I know it's still as sweet as.
What bits can I rip off the punto that will plop onto the Cinq with relative ease ?

*sorry about the thread jack, thought it would save a new post and everyone having to repeat themselves*

Take the 75 head & manifold, get it all gas flowed, get the valve seats cut properly and have the cam profile changed. It's not hard to make the SPI ECU use the MPI manifold & you'll get better fueling.

Saying that, seriously do as above then go for a full 75 engine swap if you know it's a good one, I've driven StoneNewts 75 engined Sei & it's silly quick for the money that's been put into it. He's not done much, sports exhaust manifold, cat & cat back system, induction kit, C&B 268 cam and that's it I think. One point though, he started from an MPI Sei.

I was thinking of spending next to nothing
If the cam and TB are straight bolt on's then I'd be more than happy with that, it's the wifes daily drive so I don't want to go to wild as she's already managed to collect 2 speeding tickets with the thing in standard form.

If I was to go the route of a full engine transplant then I've got a spare Kwaka 900 engine in the shed, that would be an instant 85bhp, and I know that they fit perfectly in the boot

But hasn't enough torque to push something weighing at least 5 times that of a bike!

One thing that makes my Sei' 'silly quick' isn't what's happening at 5~6.5krpm but what's happening at 1.5~3krpm, while it's no >100lbft turbo monster ask for power in that area and she'll obligee you with smooth acceleration, rather than a slight tendency to gain some speed, even in 5th gear (30 to 60mph).

You haven't tried to lift a bike of 1970's vintage have you

Actually I have, quite a few and they still weigh less than a car does.

the cento 1108 unit weights a little under a 100kg & that might have been with box can't remember. Making the Cento chassis at about 600~650kg, that's an awful lot of weight for a bike engine. Yes I'm sure they're quick at the top end but I doubt that engine would result in a car that's as drivable as a 75 engined cento.

The only bit of the 75 engine worth keeping is the cam and valve springs if you're not doing a swap.

So the TB is of no use then ?

A CG125 while doing your CBT doesn't really count little fella

The SPI & MPI TBs aren't interchangeable I believe.

I don't have a CBT, only ever ridden a scooter once on the road, I tried supermotarding one round my village . I have ridden late 60's/early 70's trials bikes (so road bikes converted basically) on and off from the age of 13, the heaviest being a Royal Enfield, built like a tank! Have also ridden montesa cotas, a bultaco, an ossa m.a.r. and a ty175, none of which are particulary lightweight.

Bultaco and Ossa....christ that takes me back to me yoof...and that was a long long long time ago

Residing in my workshop are currently

Kwaka Z1B 900
Honda CBX 1000 (six cylinder behemoth)
Suzuki GS1000
Harley Heritage 1450

The missus wants an Enfeild after riding one round India, not my cup of tea, and the pegs are all arse about face