I can't see why it wouldn't be okay to ride without the curb chain, but I don't see the point in doing that. If you're in a mullen mouth pelham without the chain, you may as well be using a straight bar snaffle. It's the curb chain along with the curb rein that adds "uumph" to the bit. The chain adds crackerjack action on the jaw when the curb rein is applied, which gives the pelham the control. If you just ride on the top rein, you are essentially using a snaffle... so without the curb rein or chain, you just have a snaffle.
The leverage doesn't come from the chain, it comes from the shanks, so with the curb rein attached, you still have some leverage from the bit but not the pressure from the curb chain. I used to ride a cob in a mullen mouth pelham without curb chain (he's in a single-jointed snaffle now) because he didn't like or need the chain, just a tad of extra leverage when he got strong. When we were getting him back in a snaffle we tried a mullen mouth first - NO brakes at ALL. He didn't take the blindest bit of notice. So a mullen mouth pelham sans chain is NOT the same as a mullen mouth snaffle.
Pelhams should be straight bars (or with low ports) anyway. Maybe with certain links in, but never a two-piece mouth. Leverage + nutcracker actions equals a very harsh bit, and no horse really needs that.
If so, yes you can use the bit without a chain... The Bit will still be used as a "levage" bit. As you have two reins, the top rein is used as a normal snaffle would, and the bottom rein would be used as a levage. The curb chain, is just a addition... Hope that helps
Yes delregans way that is exactly what I meant I will still be using the 2 reins with it just not the actual chain that slips onto the hooks on each sid. If anyone else knows anything now that you know exactly what I mean please answer so I know for sure...i don't want to go hurting my horse or anything.
Glad I was some help :) Yeh I agree, I would to strongly suggest using a broken pelham too. Straight bars, are very servere!
Straight bar pelhams are LESS severe than broken ones. Mullen mouths are best. If you do need to go for a broken mouthpeice, make sure it has more than one joint - such as a french link - and not the 'nutcracker' action of a single joint. Single joint + shanks = VERY severe.