Query Approved.

Kesava - Questions for you
1. What bike?
2. What's the make & size of your carb?
3. What's the jetsize you're running?
4. I see from your post that it used to be powerful but some experiment of your has landed it to 'poor mid range acceleration'. Can you list or revert all those changes to make it powerful (or ground 0) again?

^^ +1 to what he said.. whats the condition of the diffuser??? and the float needle?? does it have any damage or mark on the tip

I can't believe I forgot to put what bike I had in, sorry

Royal Enfield Bullet 500 (2004)
Carb is the VM28 Mikarb
Not sure what the jet is, but it is bigger than the standard jet. I had a bigger one put in.

As for the changes I have made. Too many to write. Basically when I got it back from the Enfield Dealer after a service, they hadn't adjusted it properly. The only thing that was ok was the acceleration. At around the same time as I got it back, the front bearings started making noise and I'm guessing need to be regreased and so on, however even though having them not running properly, that isn't the cause of my problems.

I have tried adjusting the clutch in case it wasn't engaging properly. I also loosened the drive chain as it was too tight.

I really don't know what else to tell you. I know that the bearings are causing somewhat of a problem, however I don't think that they are the reason the mid range acceleration is suffering. I'm going to take it to a mechanic in a week or so. But in the meantime I wanted to try and troubleshoot the problem so I can learn to fix it myself.

I'll get the mechanic to replace the front bearings and check the clutch and carb adjustment and so on. But I'm wondering if there is anything I can check myself that would be causing the mid range to suffer.

The first part of the acceleration handled by the pilot works fine and so does the full acceleration. The mid range acceleration that is handled by the main needle is the problem. But since I haven't done anything with the needle since it worked fine, I don't see how the needle itself could be the problem. Even so, should I get it replaced in case it is a bit bent or worn and is causing a problem?

^^ they dont go that easily.. and you can easily inspect the needle.

Check the float and float needle, make sure the float is intact ( not damaged or taking in petrol ). And the needle first.

The needle could possibly be a little bent. But it goes in and out fine, doesn't slow the movement of the "cylindrical thing" that is connected to the accelerator cable.

I'll check the float tomorrow. I've actually noticed a little bit of petrol leakage around the carby. So it's possible that the float isn't working fully and allowing a little too much petrol into the carb. But would that effect the mid range performance like that?

^^ it will. i had a cracked float in my tbird ( CV carb has a plastic float, the slide carb on your bullet will have a brass float ). It was taking in fuel, and affecting the running of the bike.

I dont know about bullet but in my pulsar 150, i too was experiencing mid range acceleration problems a few days back, when i get it checked from ASS they said everything is OK, that day my favorite mechanic was on leave. so i went there next day and got it checked from my fav mechanic, he said REED SWITCH is the culprit, he replaced it and bang my bike was back to normal. check whether ur bike has a reed switch.

^^ reed switch??? confusing... any more info? where was it located???

LOL

Sorry man

Sounds like me like your favourite mechanic is ripping you off. I've never heard of a reed switch, he probably made it up because the real problem was too easy to fix for him to charge you much.

I took then float out just then. It is fine, there are no cracks or petrol inside. I submerged it in a bucket of water but there were no bubbles or anything. So the float is fine and doesn't have a leak. I don't know what I'm checking for when I'm looking at the needle. I mean it has a little wear and tear and is possibly a tiny bit bent. But I can't see anything that presents a major problem.

One other thing I should mention is that I'm having problems with the clutch. I've tried my best to adjust it every way possible but still have small problems with gear changes. A friend told me that the clutch plates are either worn or the spring behind them needs replacing. The clutch plates are new so that can't be the problem.

But I'm thinking, maybe the clutch plates aren't engaging properly because they're slipping or something and that is effecting the performance. After testing it, it isn't just the mid range, the high range is effected quite a bit as well. So maybe the clutch slipping doesn't effect performance so much when I'm just cruising along slowly, but as I accelerate it really becomes noticable.

may be ur clutch plates are not adjusted properly

when u have changed ur clutch plates last time??

New clutch plates were put in about a month ago. It is highly likely that they haven't been adjusted properly. That would explain the gear change problems. Would that also be stopping them from engaging properly and therefore affecting the performance?

Sounds like an obvious question, but I thought I'd check.

Unfortunately I can't go to the mechanic during the next few days and Holi is going to start here soon. So I'll have to wait until it's over.

okay bro...

but i remember last time when my clutch plates are worn out

my mid range is effected worst and nd top end lil bit

also if needle is not adjusted properly then mid range is effected

and try to drive slowly nd on low RPM other wise head holding the plates

may suffer through some damge

happy nd safe riding