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crusader frame and bullet engine

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crusader frame and bullet engine
Started at 07:58am on the 6th April, 2018 by enfield_trials
enfield_trials Subject: crusader frame and bullet engine
Hi guys Im going to get crausder frame from my friend wanted to put bullet engine to build trials it quite common practrice . Questions .. Does it need lot of frame mod .. how about swing arm does it need to be change to fit 4.0 x 18 wheel ? Any mod please suggest and pics if possible Regards ET
Posted: 07:58am 6th April, 2018
John M Subject: crusader frame and bullet engine
There are two types of swinging arm for the Crusader type frame. The later type uses silentblock bushes like the Indian Bullets and a 4.00x18 trials tyre fits without any problems. As for frame mods, there are different ways of doing it, but when I did mine I trimmed the rear engine plates infront of the swinging arm pivot. I also cut off the lower of the two front engine mounts, as it wants to share the same space as the crankcase. There is a reinforcing tube between the top tube and the front down tube that needs cutting and re-fitting to give enough room for the cylinder head. Standard tanks will not fit as the engine is higher in the frame and fouls the base of the tank, You need to make custom engine mounting plates. I also welded on extra mounts at the rear of the gearbox mounting plates to replicate the Bullet mounting design. Bullet forks fit without modification. If you can weld it is not as involved as it may sound. I have posted pictures of the frame mods on the interweb somewhere, I will try and find them. https://ibb.co/g3ucdG
Posted: 12:13am 8th April, 2018
Alan R Subject: crusader frame and bullet engine
Abra-----Kadabra !!!!---------> ----------> ---------->P1090283
Posted: 08:45am 8th April, 2018
enfield_trials Subject: crusader frame and bullet engine
Thanks John M for your feedback. perfect that is the information i was looking for. I will save the info for future use. i think there is no mount for standard single saddle. good bike .. i like the colour you use. Ex-Works . i might try similar in my project. Thanks Alan R for photo upload. Regards ET
Posted: 07:41pm 8th April, 2018
martyn15 Subject: crusader frame and bullet engine
Hi Im also in the middle of a similar project. is it worth moving the swingarm pivot rearwards to get the engine further back in the frame? I read in Don Morley's book that these bikes are front end heavy. is that a standard Crusader front hub in the pic? I'm using a Crusader Sports swingarm that has the flat axle plates. thanks
Posted: 08:43pm 8th April, 2018
martyn15 Subject: crusader frame and bullet engine
Hi Im also in the middle of a similar project. is it worth moving the swingarm pivot rearwards to get the engine further back in the frame? I read in Don Morley's book that these bikes are front end heavy. is that a standard Crusader front hub in the pic? I'm using a Crusader Sports swingarm that has the flat axle plates. thanks
Posted: 08:43pm 8th April, 2018
martyn15 Subject: crusader frame and bullet engine
another question please. Im using a 500 Indian bullet engine in my trials project. has anybody fitted a Magneto to these engines? I want to do away with the battery and generator. thanks
Posted: 09:00pm 8th April, 2018
Alan R Subject: crusader frame and bullet engine
Hi Guys----------I believe the Lucas SR1 magneto can be made to fit ...USED2436
Posted: 10:35pm 8th April, 2018
Alan R Subject: crusader frame and bullet engine
Here's one on "You know where"..............https://www.ebay.co.uk/itm/Lucas-Magneto-SR1-Nice-blue-spark/323191580998?hash=item4b3fb82946:g:nO4AAOSwvApaKp0h
Posted: 10:38pm 8th April, 2018
Alan R Subject: crusader frame and bullet engine
Our hosts normally advertise one but nothing in stock at the moment--------They are fitted on Lister stationary engines, you might try their website or on E-Bay ( or other Brit. Bike singles clubs )...Expect to pay around £150 - £200 for a re-con one in good order..
Posted: 10:52pm 8th April, 2018
Adrian Subject: crusader frame and bullet engine
Finding SR1 magnetos isn't hard, I think you will find cheaper ones. The good news is that they bolt straight onto the Indian Bullet crankcase Alan, just as they did with the 1956-on Redditch Bullets. When Redditch swapped to contact breaker drives the crankcase dimensions weren't changed, and were also faithfully copied by RE India until the end of the classic model Bullet.

If you are happy running on fixed advance, the Indian contact breaker drive gear fits straight onto the magneto drive shaft. If you want the automatic advance and retard mechanism shown attached to the back of the magneto in Alan's picture, the bad news is that they can be a lot harder to find (though there are still some out there).

OTHERWISE (if money is no object) a BT-H electronic magneto can be used, these have automatic advance/retard built in electronically. Sadly BT-H do not YET offer a direct replacement for the SR1 magneto, but their other models "can be made to fit". Ask Bullet Whisperer...



A.
Posted: 11:26pm 8th April, 2018
John M Subject: crusader frame and bullet engine
I'll see if I can upload a couple more images that give a better view of the swinging arm pivot. I welded in the inserts for the pivots as there isn't sufficient room for the huge nuts that normally keep them in place. Make sure that you use the correct ones for your swinging arm as there are two sizes.
Posted: 01:02am 9th April, 2018
enfield_trials Subject: crusader frame and bullet engine
for trials bike project. magneto is good and tidy solution. and get rid of all batteries coil stuff

Even you can use electronic ignition in magneto body like thorspark
http://www.sussexmotorcycles.com/thorspark.html

my friend have used with them no problem.
Posted: 09:18am 9th April, 2018
Adrian Subject: crusader frame and bullet engine
I wouldn't want to criticise Thorspark as a product, but once you modify the magneto in this way you need an external power source to run the thing, my preference would be for a working magneto as a self-generating system. It doesn't have to be the SR1, either. All pre-EFI/UCE Indian Bullets still have provision for the steel straps to hold down a Lucas N1 magneto (or MO1 magdyno), so if you could sort out a mounting plate to get the magneto spindle to the correct height that is another possibility, plus you get manual advance and retard control for the ignition.

. The other solution is to use something crank-mounted. Our hosts list the PVL competition CDI ignition which simply replaces the Bullet's alternator, no battery needed. Elextrex World sell something similar, either in ignition-only or ignition plus lighting coil versions. This set-up offers more accurate ignition timing as there is no variance due to slop in the long train of timing pinions.

The budget solution is to use the existing alternator to run a battery-less 12V ignition. It just needs a healthy alternator and reg/rectifier, replace the battery with a suitable capacitor. Works well with points ignition, but don't attempt it with a Mk3 Boyer Bransden! The Mk4 or the Pazon Surefire ignitions are better able to cope with lower starting voltages which are likely at kick-over speeds, so these might work.

A.
Posted: 10:56am 9th April, 2018
enfield_trials Subject: crusader frame and bullet engine
Thanks Adrian for the info. I am not expert on Electronic ignitions.

i might go for last solution you describe. some nice idea for coming projects :-) Thanks again

Posted: 12:19pm 9th April, 2018
John M Subject: crusader frame and bullet engine
I use a Lucas SR1 magneto on mine and it has been faultless for over 9 years, other than once, when I submerged it in a deep ford. I think that the SR1 is one of the most reliable magnetos that Lucas made, (I think that it was the last model they made) and all the parts can be swapped over in minutes. There is none of the re-winding issues to replace the condenser that you get on older models as it uses a conventional separate condenser. If you can’t find an auto-advance unit they will work satisfactorily on fixed timing.
Posted: 03:41pm 9th April, 2018
John M Subject: crusader frame and bullet engine
Let's see if I've sorted this posting image business.
Posted: 04:18pm 9th April, 2018
John M Subject: crusader frame and bullet engine
Nope!!!
Posted: 04:19pm 9th April, 2018
enfield_trials Subject: crusader frame and bullet engine
John try using FULL Image html code
P1090292a P1090292xx P1090266a do you have separate dynamo on SR1 mageneto. ? handsome bike
Posted: 04:56pm 9th April, 2018
enfield_trials Subject: crusader frame and bullet engine
bit off topic . do you think gearbox in this condition can be restored. image1 2
Posted: 05:14pm 9th April, 2018

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