Skip to main content
English French German Italian Spanish

350 Model 40 with TT9 carb.

Forums

Hello. I'm a new NOC member and this is my first message. I've tried searching to see if this question has been asked and answered in the past, but can't find anything. My question relates to the TT9 "racing?" carb fitted to my 350 M40. I can start the bike, but can't idle it and I have read on the internet that this is common with so-called racing carbs. Is there a way to adjust this carb to enable it to idle, or do I have to adjust my riding style to stop from stalling when rolling off the throttle? Maybe I'd be best changing to a different carb for road use? Any advice would be appreciated. Many thanks. Paul

Permalink

Hi Paul

TT carbs don't have the facility to adjust the tickover so they do just stall. I use one on my Inter and you soon get used to keeping it running, if it runs well when you are on the go I'd stick with it.

A concentric carb is a good alternative if you don't want to have to put up with no tickover though. I also know a couple of guys that have modified there TT carbs to allow them to adjust the tickover, I must have a look and see how they actually did it at some point.

If you are fairly new to the bike, I'd carry on as it is for a while and see how you get on

Regards

Andy

Permalink

Thanks Andy.

I am new to the bike and although I can start it, it is by no means a one kick special. In fact it can take up to 20! I haven't worked out what choke, retardation, throttle it prefers for easy starting, so I haven't ventured out yet. Don't want to stall and have to walk it home. Keeping it going on my drive is hard enough and it spits a puff of smoke from the bell mouth every time I blip the throttle. I suspect it needs a good clean and resetting.

Are all inters that LOUD?

Regards

Paul

Previously andy_marks wrote:

Hi Paul

TT carbs don't have the facility to adjust the tickover so they do just stall. I use one on my Inter and you soon get used to keeping it running, if it runs well when you are on the go I'd stick with it.

A concentric carb is a good alternative if you don't want to have to put up with no tickover though. I also know a couple of guys that have modified there TT carbs to allow them to adjust the tickover, I must have a look and see how they actually did it at some point.

If you are fairly new to the bike, I'd carry on as it is for a while and see how you get on

Regards

Andy

Permalink

Are all inters that LOUD?

Yes.

TT carbs don't like low revs and sitting around. Pull out onto the road and see what it pulls like once you are moving. It's always a learning curve with a new bike, mines an easy starter now but it took me quite a while before I got the hang of it.

Permalink

Hi there,

Thought I'd just give an update. I decided for now to change my TT carb for an AMAL Mk1 concentric. I see this as a temporary measure while I get used to the bike. It's now an easy starter and idles away nicely while I get my gear on and off I go. I've kept the TT for when I'm confident enough to re-fit it.

Next issue to address is the gearbox. Finding 3rd and 4th is a nightmare! I'll post another thread on this one!

Regards

Paul

Permalink

My Dolls Head likes being full of oil..not thin stuff like 20-50 either.And of course the linkage adjustment must be correct. Instructions have been discussed here before.Also..because Amal carbs have no accelerator pump they dont take very kindly to 'blipping' too quickly because they go instantly too lean. Better to open smoothly. Same applies on starting up...dont grab throttle too fast.

Permalink

Thanks David.

I'll have a search for that thread and also check what's in my gearbox.If the linkage isn't right, could that explain why Iget first and second, but when I go for third I get neutral?

Paul

Permalink

Got home and checked gearbox lube. It is full, with ST90 gear oil. Is that thick enough?

thanks

Paul

 



© 2024 Norton Owners Club Website by 2Toucans