Hejira endurance race frame

[alfablack]

Hi new to the site and just acquired an Hejira endurance race frame last raced in 1992

Does anybody know what class it could go in dates to 1981

And originally had a gs1000 engine the rails are wide enough as to let you strip the engine in situ

[dupersunc]

Nice find. Del Chitenden was still doing bike stuff last I heard.

Could race in Formula prostocks or endurance legends amongst others.

[Dezza]

Wow, that's a really unusual frame, and you got the tank too. I always thought Hejira only did stuff for smaller motors like Rotaxs and TZs. Looking forward to seeing pics of the finished bike.

[alfablack]

Hi it is unusual but apparently handled very well was used in F1 and in European rounds of endurance

it as the same dimensions as the smaller frames 

8 where made and one us I have been told in the Smithsonian or at least an Hejira frame

got to get an engine sorted will have to see what Eblag as 

Any advice as what NOT to go for is probably more important

[Dezza]

19 minutes ago, alfablack said:

Hi it is unusual but apparently handled very well was used in F1 and in European rounds of endurance

it as the same dimensions as the smaller frames 

8 where made and one us I have been told in the Smithsonian or at least an Hejira frame

got to get an engine sorted will have to see what Eblag as 

Any advice as what NOT to go for is probably more important

What not to go for? How about NOT going for a SS swingarm conversion, wavy discs and a 916 seat unit, although it's your bike so put on it what you want to. It'd be great to keep it all as early 80s as possible though

[alfablack]

Sorry chap didn't mean take the piss

The frame and swingarm stay exactly as they were intended I meant engine wise what I know about big Suzuki engines back of a postage stamp would cover I am reading a lot of old threads  

Gs nice engine but all parts and casings 40 years old

Gsx likely in 750 form ?

Gsxr 

 

 

[stockcar]

Lovely find, if it has a sister then I'm in........

[eddiegsx]

Very interesting, an 1100et motor or one from that era should fit the bill without too much trouble.

[Dezza]

11 hours ago, alfablack said:

Sorry chap didn't mean take the piss

The frame and swingarm stay exactly as they were intended I meant engine wise what I know about big Suzuki engines back of a postage stamp would cover I am reading a lot of old threads  

Gs nice engine but all parts and casings 40 years old

Gsx likely in 750 form ?

Gsxr 

 

 

I certainly do not think you were taking the piss in any way whatsoever. I just listed some of the fashionable mods of the 90s that seem to have gone out of 'style' so sorry if I came across all bolshie. The swingarm looks great and looks like it would take almost any sized wheel without modification. For the engine, what about a GS1000 but as we all know these engines aren't exactly freely available? Looking forward to seeing more on this bike as I have never seen a Hejira frame with a big Suzuki lump in it before.

[clivegto]

Nice project you got there. Gs or gsx or even efe motor would suite it but are heavy & expensive to buy & tune. Gsxr 1100 or bandit 1200 are lighter cheaper more powerful easier to tune.

[kja.busa]

A Bandit 12 would be ideal in that frame, easily tuned, lighter than the earlier engines too.

[alfablack]

I've been offered a dot 750 engine R707 1988 

And been told it works well with a bandit 1200 bottom end

Is this the case as I am finding lots of contradictory information

On 9/19/2018 at 6:32 PM, kja.busa said:

A Bandit 12 would be ideal in that frame, easily tuned, lighter than the earlier engines too.

 

[Gixer1460]

When you say 'Bindit bottom end' you are referring to everything below the head gasket ie. the whole engine minus the cyl. head?

That's the only bit worth using and maybe the coil spring clutch. If you are considering swopping the 750 barrels on up, over to a bindit cases - i'd say why? A 750 isn't the torquest motor in the world and you'd be losing a gear with a bindit box so needing more torque........... its not a normal swap!

[kja.busa]

I think he means using the dot head on the 1200 bandit engine, replacing the 1200 head, that should be sound, a bit more compression, and the 750 cams have more lift. Some 38mm carbs from an L/M model 750 would be good too.

[alfablack]

Sorry yes I was referring to using the head and cams as this head is supposed to have big valves as well

I have a set of 36mm flatslides

What sort of power increase would you expect

[Gixer1460]

Valves are no bigger than std 1200 Blandit ones - I think the smaller chamber makes them 'appear' bigger?

[Fula28]

Alfa black ,So Power for b12 and dot head cobblmabob, 130-150 depends on headers/carbs/and any tune work. I had a nos stock head with full upperton tune/stock valves and 750 j/k cams.  It made 142bhp with 38mm headers! 

We then Skimmed the head 0.005" and added some gsxr 1000 serpent micron headers, then reject and Dyno,d to 148bhp. 38mm c.v carbs.

with your rs flatslides and some good headers (40mm) it will breath well. 

Loads of torque perfect for all.

[alfablack]

Hi thanks for the information

I have picked up a gsxr750 dot head just because it was to cheap to leave behind.

I have today collected a gsx1100tscc complete engine how do I find out what year it would be from its been out of the frame and under a bench for that long the guy can't remember

[Dezza]

1 hour ago, alfablack said:

Hi thanks for the information

I have picked up a gsxr750 dot head just because it was to cheap to leave behind.

I have today collected a gsx1100tscc complete engine how do I find out what year it would be from its been out of the frame and under a bench for that long the guy can't remember

If you post the engine nu,ber here in the aircooled section, one of the gurus will be able to tell you the source model. A pic of the cam cover/head will help here as there is some variation in these among the different models.