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#1 Adspickup

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Posted 01 January 2018 - 11:59 AM

This year I am hopefully going to get round to doing my promotive build in my 1993 Cooper spi. The thing I would like to know more about is the chain drive on the promotive front engine kit. I have read and heard that due to the chain being so short the life of the chain suffers. What sort of mileage do you get from the chains?

 

Also is there anyone in the bucks area with promotive mini? Would love to have a nosey round one and possibly a ride.


Edited by Adspickup, 01 January 2018 - 12:00 PM.


#2 absx2

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Posted 01 January 2018 - 06:35 PM

Hi, I don`t know anything about the promotive kit other than it uses a R1 motor, or is it two ?

 

Having briefly owned an r1 I can tell you after as little as 1000 miles the chain gets noisy due to stretch if used hard and that`s what they are for :) and after 3000 miles and the third back tyre its time to replace. You can double the mileage with sensible use and strict maintenance but I would guess the chain would be half the length and pulling twice the weight so its going to be a routine service part.

If you go down that route and the build uses the same 530 pitch chain try and buy a Regina chain as they stretch less than a DID and don`t go near an Iris chain or it will rattle within 600 miles. The sprockets will be fine as its just rapid chain stretch in a short time causing noise annoyance and I replace chains probably before I need to but iv`e had two let go in 30 odd years of biking and its not fun.

 

An R1 is fun over 100 mph and a burden below it which is why i don`t own one anymore and stick to sensible adventure trails bikes that help keep my licence and body parts.

Its embarrassing following a bus doing 20 mph up the town center when you`re revving the motor more than the kid on the scooter next to you as it has no low down pull coupled with the fact you have to knock it down four gears to over take slow moving vehicles below 50 mph and the amount of clutch slipping in traffic is a pain.

I would personally be looking at a car engine conversion for use on the public highway as the R1 would be a weekend short burst hooligan car of limited use.

..........Mmmmm Hooligan car..... ;) 



#3 Adspickup

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Posted 01 January 2018 - 06:55 PM

Thanks

 

It will just be a mad weekend car so driveability isn't too much of a problem. Along as its quick and noisy I will be happy. The chain is my main concern as I will like to take it places and shows.



#4 racerlike

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Posted 04 January 2018 - 07:55 PM

The chain makes a bit of noise but there are a lot of other noises going on too. It all sounds very mechanical so I would say you don't really notice the chain noise in isolation.
Not sure on chain stretch and durability as only covered a few hundred miles in mine but what I can say is I didn't get on with the self adjusting tensioner. I found it kept allowing the chain to go slack so did away with it and fixed the tension of the chain - as you do on a bike - and just monitor it and tighten if needed by adding a washer.

For limited use on weekend blasts I cant imagine you would be burning through chains very often

#5 Adspickup

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Posted 07 January 2018 - 06:58 PM

The chain makes a bit of noise but there are a lot of other noises going on too. It all sounds very mechanical so I would say you don't really notice the chain noise in isolation.
Not sure on chain stretch and durability as only covered a few hundred miles in mine but what I can say is I didn't get on with the self adjusting tensioner. I found it kept allowing the chain to go slack so did away with it and fixed the tension of the chain - as you do on a bike - and just monitor it and tighten if needed by adding a washer.

For limited use on weekend blasts I cant imagine you would be burning through chains very often

Thanks 

 

Im used to the mechanical noise as previously being a Caterham owner. Will look forward to the build and once finished always have a spare chain ready to go. 






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