HD: Snapped the drive belt

[Pixie]

Heh, don't rub it in, that's cruel.

Seriously though, have you had a chain break on your 'glide? I've recently been told horror stories about chains breaking under load and punching holes in the primary case.

160 hp + litre bikes break their chains all the time,so a 60 hp Hardley is in real danger

[Headbanger]

160 hp + litre bikes break their chains all the time,so a 60 hp Hardley is in real danger

If you have ever tried to shear a metal object you would understand its torque that does it, not revs.

[NOWOOL]

How many K's did you have on the belt before it snapped?

[Headbanger]

No idea, It was on the bike when I bought her, Looking at it there is no sign of wear but I can quite clearly see where a stone has damaged the belt prior to it breaking.

And I have been up quite a few gravel roads, and the 3 foot deep layer of stone chips the monkeys lay on the road wouldn't help either.

[Blatman]

Jeez, after reading all this I'm glad I've got a shaft drive! No maintenance except for an oil change every few years and that's with 150+hp and truck loads of torque. Are no Harleys made with shafts?

[Headbanger]

Righto, Belt arrived today, Me old mate isn't available to give me a hand if I done it myself (which kills that plan, I know my limitations), Me other mate the mechanic is busy with other things and laying low.

So, Its booked into Pro Cycles, It was going that way before the belt snapped anyway as I wanted her put on the dyno, so now its a case of 2 birds with one stone.

[rok-the-boat]

If you ride a Harley then you need to stock up on spares or the shops will strand you. When I had mine in Korea I had a spare everything, including a belt. I ordered online from the USA and they arrived pretty quickly. Be on the ball and look after yourself - no one else will.

And have you tried fitting the belt - what a nightmare!

ANd stay away from gravel roads - they will chew your belt to bits. That being said, I did over 10,000 with a half stone chewed up belt, no worries. But that's why I had the spare... but not hte kind of item you can change at the side of the road. I replaced mine when I did my clutch.

[bsasuper]

.So, Its booked into Pro Cycles, It was going that way before the belt snapped anyway as I wanted her put on the dyno, so now its a case of 2 birds with one stone.

Invest the money for the dyno run on a spare belt instead,pointless dynoing a harley lump unless you really really want a piece of paper that says 90hp (a good one)

[paulmac:Me]

Try Speed n custom in wellington for spares. Good people and good service

[peasea]

Invest the money for the dyno run on a spare belt instead,pointless dynoing a harley lump unless you really really want a piece of paper that says 90hp (a good one)

I would say that dyno'ing anything is worth it to obtain the best reslults from any given combination, even a stock machine can benefit from minor changes. So many bikes (and cars) are set up lean from the factory to assist in meeting tight pollution regs. Getting back to a correct air/fuel ratio can reap huge benefits without affecting mileage to a great extent and in some cases it can actually be improved.

It's not always about having a slip of paper to obtain bragging rights. I'd much rather have a sweet runner, working correctly for its application, than a big hp machine that's a sack of shit in the real world. Having built countless performance engines I can tell you that it's difficult talking people OUT of lumpy cams and big carbs. Less is more (in most cases) unless you're going to dedicate the machine to track use. And, the principles are the same for any naturally aspirated four stroke engine.

I say dyno it, but don't set your final output expectations too high, just look for the 'sweet spot'.

[Headbanger]

Invest the money for the dyno run on a spare belt instead,pointless dynoing a harley lump unless you really really want a piece of paper that says 90hp (a good one)

The reason for sticking her on a dyno is to to get her tuned as well as possible, Not to get a meaningless read-out.It turns out she starved for air-flow and was flooding when opened right up.



Yeah, what a waste of time finding that out was, I should have got a spare belt instead....

[bsasuper]

... she starved for air-flow and was flooding when opened right up...

I sold my harley 5yrs ago because they cant even get it right at the factory.

[popelli]

I sold my harley 5yrs ago because they cant even get it right at the factory.

No they don't get it right emission and sound leglislation kill them - but that can be rectified easily

a decent exhaust, mild cam, decent carb and remove all the emission controls and you have a bike running like it was designed to be run

If you stick to a standard unmodified bike you will not be that impressed - changes like the above usually net 10- 20% more power

[Headbanger]

Rghto, still without my bike, But at least I have spent a lot of money. And its pretty much my fault.

Actually I haven't got the bill yet and I bet its going to be massive.

Anyway, when I bought my carb from the USA I purchased the cheap option, It came with no mounting hardware or air cleaner etc. Which means when it was installed the lads doing it had to scrounge through their substantial stash of parts and use whatever they could find(and I was told this was a shit idea at the time in no uncertain terms, I just figured they were lazy). It turns out a couple of items weren't suitable (especially the air filter element which looks perfectly clean but won't actually allow air to pass through it) and this is what caused the bike to starve for air, The kicker is this was found out by order of elimination only after the bike insuisted on flooding. This translates directly into money per hour.

Secondly I instructed them to make the bike quieter, Turns out she just drops her arse when either the intake or the outtake is messed with, The new baffle robs her of 15HP, so after all that time rebuilding the baffle its been thrown away and a "competition" Vance and Hines item fitted.

Ching ching.

HP wise I'm told a stock evo reads 55HP at the back wheel on their dyno, Mine reads 75HP at the moment, when the baffle I had made is fitted it drops down to 60HP.

[Bonez]

Goodness you're right royally forked . How do the torque figures equate?