Author Topic: Hawk 400 gas mileage  (Read 4306 times)

0 Members and 1 Guest are viewing this topic.

Offline old smokey

  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 709
Hawk 400 gas mileage
« on: August 19, 2013, 08:56:25 PM »
This could be for anyone wanting to help send me off troubleshooting.
I've been using the 400 Hondamatic as my frequent rider to work (unless forecast is higher than 70% rain chance).
It was getting around 44-48 mpg per tank.
The last 2 tanks now it's getting around 36-37 mpg.
I pulled the plugs tonight and the left is darker than the right.
I think the pictures exaggerate that a bit.
Do you think this is a carb problem?
I haven't really noticed any change in the performance or idle of the bike....
'67 350 GTR undergoing repairs with a '75 Yamaha TX500 front end

Offline old smokey

  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 709
Hawk 400 gas mileage
« Reply #1 on: August 19, 2013, 08:59:46 PM »
this is the way the left cylinder looks. It has a little oil seepage at the base of the left cylinder. This is maybe slightly more than the right, but not by much.
« Last Edit: August 19, 2013, 09:04:28 PM by old smokey »
'67 350 GTR undergoing repairs with a '75 Yamaha TX500 front end

Offline old smokey

  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 709
Hawk 400 gas mileage
« Reply #2 on: August 19, 2013, 09:02:39 PM »
this is the left cylinder photo taken early spring 2012. I guess the oil stain has grown downwards over the last 1500-2000 miles.
'67 350 GTR undergoing repairs with a '75 Yamaha TX500 front end

reed

  • Guest
  • Trade Count: (0)
Re: Hawk 400 gas mileage
« Reply #3 on: August 22, 2013, 09:40:48 PM »
Dave,
Its time for a good tune up oil and filter Valve clearances air filter plugs.
Timing chain adjustment plus i would look into the carbs etc.
Thanks.
Steve.
PS if you need any help i am a phone call away!!

Offline old smokey

  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 709
Re: Hawk 400 gas mileage
« Reply #4 on: August 26, 2013, 06:57:59 PM »
Hi Reed,
Maybe I'll just add this to the winter project list and then decide which winter it will be...
It almost falls in the category of selling it as is, keeping it around to try and fix up, or just keep riding it as is.
Reed, if we lived closer to one another I'd probably pay you to have it done.
'67 350 GTR undergoing repairs with a '75 Yamaha TX500 front end

Offline old smokey

  • Trade Count: (0)
  • Master Registered Bridgestone Member
  • *****
  • Posts: 709
Hawk 400
« Reply #5 on: September 09, 2013, 08:14:16 PM »
I rode the Hawk again today. Last week I was noticing how the chain was getting loose and there is "rusty" powder on the back rim. Today after getting home I looked a little closer and see the rear sprocket has a definite leaning to the teeth. I think it's done being ridden for this year.
It needs new sprockets and chain, front fork seals, front disk brake or pads, a major tune-up and some gaskets. ::)
'67 350 GTR undergoing repairs with a '75 Yamaha TX500 front end

 


Gallery


Views:333
Comments (0)
By: Jon West

Views:1468
Comments (0)
By: rwgibbon

Views:1801
Comments (0)
By: Perry L Anderson

Views:1870
Comments (0)
By: Perry L Anderson

Classifieds

BS 175 DT Carburettors Mikuni VM 17 s

Price: 180.00 EUR
Date: 04/14/2024 09:55 am
Time Left:
BS175 DT 1966 Gas Tank

Price: 180.00 EUR
Date: 04/14/2024 09:37 am
Time Left:
Gto
Date: 03/02/2024 06:49 am
Time Left:
Looking for a BS90 used or new luggage Carrier assembly

Date: 02/01/2024 04:19 pm
Time Left:

Recent Downloads added

Parts Manual BS-7 Std & Deluxe with new style part numbers
Rating: (None)
Filesize: 5483.15KB
Date: Yesterday at 10:15:22 AM
Chibi, Chibi Deluxe, Tora Service Manual
Rating: (None)
Filesize: 20383.27KB
Date: May 01, 2023, 08:35:39 PM
Chibi_Tora_Parts_Manual
Rating: (None)
Filesize: 14301.44KB
Date: May 01, 2023, 08:25:53 PM
BS200 Mk II RS & MK II SS Exclusive Parts
Rating: (None)
Filesize: 358.29KB
Date: March 07, 2021, 07:30:10 PM

Powered by EzPortal