UK Monster Owners Club Forum » .: Warm Up Area :. » A nice place for new members to say hello » small issue

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-08-2020, 10:16 PM   #1
craig2494
Guest
 
Posts: n/a
small issue

Hi to everyone, this is my first post and I'm asking for help.
I have completely rebuilt my M750 into a cafe racer. The small issue im having is it stutters when in top gear around 65mph. Everything electrical is new and it revs as it should in all other gears. I think its a fueling issue. Has anyone removed the vacuum type fuel pump and fitted a electric pump, if so which one have you used ?

Any thoughts would be greatly received
  Reply With Quote
Old 15-08-2020, 10:38 PM   #2
Mr Gazza
Lord of the Rings
 
Mr Gazza's Avatar
 
Join Date: May 2013
Location: Norwich
Bike: M900sie
Posts: 5,963
The vacuum pumps can be rebuilt with new parts, but they usually cause priming problems and therefore poor starting rather than high speed supply.

If you have done away with the grey triangular plastic pods in the frame either side, it can upset the running at certain speeds, and also bizarrely at certain angles of side winds.

Oh, and welcome to the club btw..
__________________
Mr Gazza is offline   Reply With Quote
Old 15-08-2020, 10:49 PM   #3
craig2494
Guest
 
Posts: n/a
Thanks Gazza, that was a really good guess. i still have them so ill put them on an go for a ride tomorrow, fingers crossed as its a real issue when overtaking.
  Reply With Quote
Old 15-08-2020, 11:13 PM   #4
Mr Gazza
Lord of the Rings
 
Mr Gazza's Avatar
 
Join Date: May 2013
Location: Norwich
Bike: M900sie
Posts: 5,963
Their function is to allow the vent pipes from the carbs to end in still air, so hopefully you can remember which pipes it was that were in the pods originally, as I couldn't help you with that I'm afraid.
Good luck, hope it works.
__________________

Last edited by Mr Gazza; 16-08-2020 at 09:45 AM.. Reason: Added a 'p' so you didn't try and put pies in the pods!
Mr Gazza is offline   Reply With Quote
Old 16-08-2020, 05:51 AM   #5
Moco1961
Guest
 
Posts: n/a
Quote:
Originally Posted by craig2494 View Post
Hi to everyone, this is my first post and I'm asking for help.
I have completely rebuilt my M750 into a cafe racer. The small issue im having is it stutters when in top gear around 65mph. Everything electrical is new and it revs as it should in all other gears. I think its a fueling issue. Has anyone removed the vacuum type fuel pump and fitted a electric pump, if so which one have you used ?

Any thoughts would be greatly received
Hi Craig, sounds an interesting project, welcome aboard. You can always join us at our monthly meeting which will be starting again in September.....restrictions permitting of course. Look out for Manchester and north west post.

Would be great to see your bike .....and you of course
  Reply With Quote
Old 16-08-2020, 10:17 AM   #6
Flip
Registered User
 
Flip's Avatar
 
Join Date: Mar 2010
Location: Beachtown
Bike: M900
Posts: 2,188
Welcome along- we need pictures but you’ll need a hosting site to post them here.

Yep I agree with Gazza’s suggestion of the grey pods- without them it can give a feeling if pulsing when on a steady cruising throttle.

Locating the tubes in some still air should cure it but you say it’s an issue when asking for more fuel when over taking which isn’t usually a symptom- is 65mph a bit slow for top gear on a 750?
__________________
You're perfect, yes, it's true- But without me you're only you!
Flip is offline   Reply With Quote
Old 16-08-2020, 10:33 AM   #7
mickj
Registered User
 
mickj's Avatar
 
Join Date: Jun 2018
Location: Clevedon
Bike: M1200s
Posts: 565
Welcome to the forum Craig.
__________________
Keep the rubber side down. Mick
mickj is offline   Reply With Quote
Old 16-08-2020, 01:54 PM   #8
craig2494
Guest
 
Posts: n/a
Thanks

Thank Chaps, Ive just fitted one of the grey pods(lost the other) but ive joined the both pipes into one to test it out the fix. Just been out and its perfect !!!

Thanks for the Advise and i will definitely meet up with you all, think i owe pint or two

Ill try and get a few pictures on this afternoon, I'm quite pleased with how its turned out.

I went to the super-bike factory in Macclesfield yesterday with a couple of mates and genuinely didn't see a bike i would have wanted instead. Though there was loads there in the new building.
  Reply With Quote
Old 16-08-2020, 02:20 PM   #9
Mr Gazza
Lord of the Rings
 
Mr Gazza's Avatar
 
Join Date: May 2013
Location: Norwich
Bike: M900sie
Posts: 5,963
Nice one..

I'm virtually teetotal but I accept chocolate Hobnobs..

If you want to ditch the pod(s) again all you have to do is find a location with still air for the ends of the pipes. I think others have done it, but I don't run carbs anymore, so I can't suggest a place.

You will do much worse than riding out to meet the North-West gang, they're a nice bunch as mis-fits go..
__________________
Mr Gazza is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:47 PM.

vBulletin Skins by vBmode.com. Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.