G oog le Buell 1125R Forum | Login/out | Topics | Search | Custodians | Register | Edit Profile


Buell Forum » 1125R Superbike Board » Archive through June 17, 2014 » High humidity, bad cold starts? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Saturday, June 14, 2014 - 12:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Could high humidity cause hard cold starts? The humidity here has been ~80-90% the past few days with temps in the high 80's low 90's. Lately my R has had a hard time starting cold. Usually takes 2 tries and a little wristing the throttle. The bike just turns over and over with a few small backfires out of the exhaust. If I release the starter and try again is spurs to life like it never even happened. Clean the IAC maybe? Hot starts don't seem to be a problem.
Top of pagePrevious messageNext messageBottom of page Link to this message

Captjoe
Posted on Saturday, June 14, 2014 - 07:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sounds like a summer in Toronto. However, mine has never had a problem starting under similar temps and humidity. Almost sounds like the mixture maybe a little too rich for the conditions?

(Message edited by captjoe on June 14, 2014)
Top of pagePrevious messageNext messageBottom of page Link to this message

D_adams
Posted on Saturday, June 14, 2014 - 07:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's a fuel injected motor, twisting the throttle really doesn't do anything for it like it would have on a carbureted motor. There's no accelerator pump or enrichening circuit to dump additional fuel in, so in reality, it's leaning it out most likely. Personally, I'd try changing the plugs first. If you haven't cleaned the IAC it would be worth doing. Beyond that, when was the last time the valves were checked/adjusted?
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Saturday, June 14, 2014 - 11:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Valves were checked/adjusted about 500 miles ago. The ones that were out of spec I shimmed back in, however there were a couple of valves on the tight side but still in spec that I didn't shim due to Harleys lack of inventory. My plan for that is to reinspect/readjust this winter.

However I was a good little boy and changed the plugs while I was in there.
Top of pagePrevious messageNext messageBottom of page Link to this message

Cataract2
Posted on Saturday, June 14, 2014 - 11:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well, for the future I recommend getting the Hotcam shim kit for the 1125.

http://www.jcmotors.com/hot-cams-valve-shim-kits-1 0mm-31903-p

Just allows you to ensure you can do them whenever you are in there without depending on HD for them.

Crazy they didn't have them. Sucks for even the VROD owners of that area.
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Saturday, June 14, 2014 - 12:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks. I was actually planning on getting that kit. Funds were tight when I did the inspection as I had just bought the bike the week before haha. I wasn't going to ride it without a valve inspection first.

Here's something weird though. It rained like crazy last night, so the humidity is gone today. Bike fired right up. Here's a crazy thought, and let me know if it is even feasible. With the air being so hot and wet during the day when I ride, the IAC hose sucks in the wet air. When I stop the bike for the night the heat from the bike evaporates the air up into the air box. When it cools off at night the air condenses onto the IAC valve, when then gets an erroneous reading on start up. Is that crazy? I feel like that's crazy.
Top of pagePrevious messageNext messageBottom of page Link to this message

Pmjolly
Posted on Saturday, June 14, 2014 - 01:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mine has done it at different times, cold or hot. It's done it since I got it in early '09. Sometimes, it will just crank over and backfire once. It always starts right after that. Sometimes it will fire up on the first try. It's the nature of the beast. I don't consider it a problem unless it takes three tries to start it.
Top of pagePrevious messageNext messageBottom of page Link to this message

Pmjolly
Posted on Saturday, June 14, 2014 - 01:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

BTW, my 1190RX shares some of the same traits. Haha.
Top of pagePrevious messageNext messageBottom of page Link to this message

Brokengq
Posted on Saturday, June 14, 2014 - 04:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Nobody likes a bragger pmjolly ; )
« Previous Next »

Add Your Message Here
Post:
Bold text Italics Underline Create a hyperlink Insert a clipart image

Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Post as "Anonymous" (Valid reason required. Abusers will be exposed. If unsure, ask.)
Enable HTML code in message
Automatically activate URLs in message
Action:

Topics | Last Day | Tree View | Search | User List | Help/Instructions | Rules | Program Credits Administration