OzVMX Forum

Marque Remarks => Suzuki => Topic started by: JC on July 17, 2008, 12:23:49 pm

Title: SP370-DR400 cam interchangeability
Post by: JC on July 17, 2008, 12:23:49 pm
Can anyone tell me if the cams are interchangeable on the 370 & 400 SP/DR's of late 70's-early 80's?
Title: Re: SP370-DR400 cam interchangeability
Post by: oldfart on July 17, 2008, 02:36:49 pm
Kawboy
           Best to use the DR 400 top end as they are a straight bolt on .
Make sure you  have cleaned out the oil gallery & buy a new oil filter as they have a bad habbit of chewing out the head cam bearings.
370 motor also accepts the 400 barrel -head n topend  ;)
Title: Re: SP370-DR400 cam interchangeability
Post by: JC on July 17, 2008, 02:39:29 pm
Thanks Oldy,

So the cams are not interchangeable?
Title: Re: SP370-DR400 cam interchangeability
Post by: Tony T on July 17, 2008, 02:53:03 pm
I've got tonnes of SP/DR370 parts to get rid of................  ;)
Title: Re: SP370-DR400 cam interchangeability
Post by: oldfart on July 17, 2008, 03:00:54 pm
Tony what's the heads like at the cam bearings ???
Title: Re: SP370-DR400 cam interchangeability
Post by: Tony T on July 17, 2008, 07:07:38 pm
From memory, I think they're ok, Stewy. But when I'm home on Saturday, I'll check it out.
that stuff will go seriously cheap. Demand for SP370's isn't that great.

Yeah, I know........... I can't believe it either................  :D
Title: Re: SP370-DR400 cam interchangeability
Post by: Freakshow on July 18, 2008, 12:12:43 am
that motor has never travelled further in its life than it has in the last 3 months............. hehee
Title: Re: SP370-DR400 cam interchangeability
Post by: oldfart on July 18, 2008, 03:32:25 pm
Tony if the heads and rocker gear  are OK- I'll take one or more  IF Kawa doesn't want em .

Believe or not the I can get the SP 370 to rev harder than the DR  400  ::)
Title: Re: SP370-DR400 cam interchangeability
Post by: Tony T on July 18, 2008, 05:36:01 pm
I'll check out what there over the weekend.
There's lots of motor bits I reckon.
Title: Re: SP370-DR400 cam interchangeability
Post by: cloggy on October 20, 2008, 05:39:02 am
370 carb has points on end, 400 doesn't.
I think the reason for the 370 revving better is the carb. I used to think it was the ignition [400 has black box advance] but since using a 370 carb .....
Title: Re: SP370-DR400 cam interchangeability
Post by: oldfart on October 20, 2008, 04:01:27 pm
Both running the same carb ( and jets )    I would tend to agree it's in the points setting .
The 370 just rev harder .
Title: Re: SP370-DR400 cam interchangeability
Post by: cloggy on October 20, 2008, 06:40:03 pm
I have had a vast improvement with the earlier carb but other than that no comparison so thanks. When they came out the sp was a fair bit faster through the speed trap
Title: Re: SP370-DR400 cam interchangeability
Post by: cloggy on October 20, 2008, 06:46:43 pm
Further to that back in the 80s a friendly electronics mate said the black box was dead crude and just came on full advance about 3 to 3.5 thousand revs. That being so a modern more sophisticated device might have more tuning effect than anything else!