Need engine swap on C50 - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #1 of 6 (permalink) Old 11-02-2016, 03:20 PM Thread Starter
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Need engine swap on C50

I bought my C50 with about 27,000 in good shape. First thing I did was a fresh oil change and enjoyed the bike. I didn't realize at the time it was burning about 1/2 qt oil every 1000 miles. At the next oil change it was down almost 2 qts, oops! That may have been the beginning of a chain of events where now at 38,000 it is burning 1 qt every 300 miles with compression pressure of 90 and 95 psi in the cylinders, verified with two different testers, and running rough. I suspect most of the damage is in the heads because the compression improved only about 5 psi after injecting a tbsp of oil around the cylinders. I initially planned on doing a rebuilt until adding up the cost for parts, ouch.

Well, I found a good deal on a used engine on EBay with 12,558 miles with compression pressure in both cylinders of 195 psi. tested by the top rated seller with a positive fb of 99.8%. I plan on doing an oil and filter change, then test the compression before installation to verify. My question for all you gear heads is should I replace the crank bearings and piston rings while it is out of the bike? I feel comfortable doing the work myself, I previously rebuilt a car engine many years ago. It wouldn't add too much cost to the swap, I only paid $500 for the motor. Any other suggestions would be greatly appreciated. Thanks.
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post #2 of 6 (permalink) Old 11-02-2016, 03:28 PM Thread Starter
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Forgot to mention in the first post that I recently did a valve adjustment and know the clearances are good.
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post #3 of 6 (permalink) Old 11-02-2016, 04:21 PM
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According to my Clymers manual..

Standard compression - 246.5 - 188.5 psi
Service limit - 159.5 psi
Max difference between cylinders - 28 psi

At 195 psi, you are in spec. There is no reason to tear the new engine down and do anything, unless you absolutely want to.
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post #4 of 6 (permalink) Old 11-02-2016, 04:31 PM Thread Starter
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Thanks for the reply. I read that in my manual as well. Since the 195psi is near the limit, I thought spending an extra $150 on parts to do a minor rebuilt might extend the life of the engine.
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post #5 of 6 (permalink) Old 11-02-2016, 05:26 PM
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Quote:
Originally Posted by Newbiker View Post
Thanks for the reply. I read that in my manual as well. Since the 195psi is near the limit, I thought spending an extra $150 on parts to do a minor rebuilt might extend the life of the engine.
Your $150 in parts will require the same tear down of the engine that your used engine acquisition was made to avoid. The only difference would be in the parts necessary to get it back to running condition.
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post #6 of 6 (permalink) Old 11-02-2016, 05:40 PM
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Drop the motor in and start riding...............from day one (bought new- 0 miles) my 05' C50 used 1 quart every 500 miles. Dealer said it was "normal usage". I put 24K miles on it and traded it back in to the same dealer.
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Last edited by Duffy; 11-02-2016 at 05:42 PM.
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