Transalp Engine Swaps - Revision history

Jeff: /* Rotax V990/Aprilia 1000 */

2026-06-04T21:44:00Z

Rotax V990/Aprilia 1000

← Older revision		Revision as of 21:44, 4 June 2026
Line 68:		Line 68:

	== Rotax V990/Aprilia 1000 ==		== Rotax V990/Aprilia 1000 ==

			Additional Rotax V990 details are on the [[Rotax V990]] page.

	The Rotax V990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.		The Rotax V990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.

Jeff: /* Aprilia/Rotax V990 */

2026-05-18T22:00:12Z

Aprilia/Rotax V990

← Older revision		Revision as of 22:00, 18 May 2026
Line 67:		Line 67:
	[https://advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1139#post-44009595 Additional information from Skyliner about the clutch, firing order, cylinder heads, and exhaust] (Feb 20, 2022). [https://www.advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1140#post-44011197 This post] covers cooling plumbing and FCR carburetors.		[https://advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1139#post-44009595 Additional information from Skyliner about the clutch, firing order, cylinder heads, and exhaust] (Feb 20, 2022). [https://www.advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1140#post-44011197 This post] covers cooling plumbing and FCR carburetors.

	== ~~Aprilia/~~Rotax V990 ==		== Rotax V990/Aprilia 1000 ==

	The Rotax V990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.		The Rotax V990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.
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	* Shift drum rotated 180 degrees		* Shift drum rotated 180 degrees
	</blockquote>		</blockquote>

			The ETV1000 Caponord used 47mm throttle bodies. The SL1000 Falco, RST1000 Futura, and 2002-2005 Tuono used 51mm throttle bodies. The 2006-2009 and 2004-2009 RSV1000 used 57mm throttle bodies.

	=EFI Conversion=		=EFI Conversion=

Jeff: /* Transmission Gear Ratios */

2026-05-17T21:13:51Z

Transmission Gear Ratios

← Older revision		Revision as of 21:13, 17 May 2026
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	\| 1.125		\| 1.125
	\| 0.961		\| 0.961
			\| -
	\|-		\|-
	! NT650		! NT650
Line 245:		Line 246:
	\| 1.174		\| 1.174
	\| 0.965		\| 0.965
			\| -
	\|-		\|-
	! XL650V/XL700V		! XL650V/XL700V
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	\| 1.111		\| 1.111
	\| 0.961		\| 0.961
			\| -
	\|-		\|-
	! XRV750		! XRV750
Line 259:		Line 262:
	\| 1.272		\| 1.272
	\| 1.083		\| 1.083
			\| -
	\|-		\|-
	! Honda VT750C		! Honda VT750C
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	\| 0.960		\| 0.960
	\| 0.852		\| 0.852
			\| -
	\|-		\|-
	! Aprilia Tuono		! Aprilia Tuono

Jeff: /* Aprilia/Rotax V990 */

2026-05-17T21:12:15Z

Aprilia/Rotax V990

← Older revision		Revision as of 21:12, 17 May 2026
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	</blockquote>		</blockquote>

	There are a few different variants of the Rotax 990 used across several Aprilia models.		There are a few different variants of the Rotax 990 used across several Aprilia models. I have skipped the Mille, because it's the least suitable to this application.
	{\| class="wikitable"		{\| class="wikitable"
	! Model		! Model

Jeff: /* Aprilia/Rotax V990 */

2026-05-17T21:10:56Z

Aprilia/Rotax V990

← Older revision		Revision as of 21:10, 17 May 2026
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	In addition to Aprilia motorcycles, a similar Rotax 990 is used in the Can-Am Sypder RS and RT models. In the Can-Am, the transmission is reconfigured to provide five forward gears and a reverse gear, instead of the six forward gears found in the Aprilia variants.		In addition to Aprilia motorcycles, a similar Rotax 990 is used in the Can-Am Sypder RS and RT models. In the Can-Am, the transmission is reconfigured to provide five forward gears and a reverse gear, instead of the six forward gears found in the Aprilia variants.

	[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille ~~(Rotax 990)~~ engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame. [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series. There is also [https://www.flickr.com/photos/127444071@N04/with/54697455024 a set of photos on Flickr].		[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame. [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series. There is also [https://www.flickr.com/photos/127444071@N04/with/54697455024 a set of photos on Flickr].
	<blockquote>		<blockquote>
	* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])		* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])

Jeff: /* Aprilia/Rotax 990 */

2026-05-17T21:10:38Z

Aprilia/Rotax 990

← Older revision		Revision as of 21:10, 17 May 2026
Line 67:		Line 67:
	[https://advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1139#post-44009595 Additional information from Skyliner about the clutch, firing order, cylinder heads, and exhaust] (Feb 20, 2022). [https://www.advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1140#post-44011197 This post] covers cooling plumbing and FCR carburetors.		[https://advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1139#post-44009595 Additional information from Skyliner about the clutch, firing order, cylinder heads, and exhaust] (Feb 20, 2022). [https://www.advrider.com/f/threads/show-us-your-transalp-modifications.39170/page-1140#post-44011197 This post] covers cooling plumbing and FCR carburetors.

	== Aprilia/Rotax ~~990~~ ==		== Aprilia/Rotax V990 ==

	The Rotax ~~990~~ engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.		The Rotax V990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.

	In addition to Aprilia motorcycles, a similar Rotax 990 is used in the Can-Am Sypder RS and RT models. In the Can-Am, the transmission is reconfigured to provide five forward gears and a reverse gear, instead of the six forward gears found in the Aprilia variants.		In addition to Aprilia motorcycles, a similar Rotax 990 is used in the Can-Am Sypder RS and RT models. In the Can-Am, the transmission is reconfigured to provide five forward gears and a reverse gear, instead of the six forward gears found in the Aprilia variants.

Jeff: /* Aprilia/Rotax 990 */

2026-05-16T05:50:27Z

Aprilia/Rotax 990

← Older revision		Revision as of 05:50, 16 May 2026
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	! Engine Code		! Engine Code
	! Compression		! Compression
	! Horsepower/Torque		! Horsepower / Torque
	\|-		\|-
	! Falco		! Falco
Line 102:		Line 102:
	\| RST1000		\| RST1000
	\| V990 PW		\| V990 PW
	\| 11.4:1		\| 11.8:1
	\| 113 HP @ 9250 / 70.8 lb-ft @ 7250		\| 113 HP @ 9250 / 70.8 lb-ft @ 7250
	\|-		\|-
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	* Heavier flywheel		* Heavier flywheel
	* Smaller throttle bodies		* Smaller throttle bodies

			Caponord:
			* No cam position sensor

	Mille		Mille

Jeff: /* Aprilia/Rotax 990 */

2026-05-16T00:23:00Z

Aprilia/Rotax 990

@@ Line 70: / Line 70: @@
 The Rotax 990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame.  If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame.  Aprilia uses the Rotax engine is a stressed member.
 [https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille (Rotax 990) engine into a Hawk GT frame.  [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame.  [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series.  There is also [https://www.flickr.com/photos/127444071@N04/with/54697455024 a set of photos on Flickr].
@@ Line 75: / Line 77: @@
 * The rear, top bolt fits nearly identically.  (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp.  The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])
 * The front sprocket was 7mm high, requiring the engine to be tilted forward.  (Explained [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=1m27s at 1:27 in the video])
 </blockquote>

Jeff: /* Aprilia/Rotax 990 */

2026-05-14T20:21:32Z

Aprilia/Rotax 990

← Older revision		Revision as of 20:21, 14 May 2026
Line 71:		Line 71:
	The Rotax 990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.		The Rotax 990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.

	[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille (Rotax 990) engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame. [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series.		[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille (Rotax 990) engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame. [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series. There is also [https://www.flickr.com/photos/127444071@N04/with/54697455024 a set of photos on Flickr].
	<blockquote>		<blockquote>
	* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])		* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])

Jeff: /* Aprilia/Rotax 990 */

2026-05-14T20:06:34Z

Aprilia/Rotax 990

← Older revision		Revision as of 20:06, 14 May 2026
Line 71:		Line 71:
	The Rotax 990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.		The Rotax 990 engine used in various Aprilia 1000 models might conceivably be made to fit into the Transalp frame. If so, it will definitely require custom mounting brackets, and may require the complete removal of the lower cradle from the frame. Aprilia uses the Rotax engine is a stressed member.

	[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille (Rotax 990) engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame.		[https://www.hawkgtforum.com/forum/honda-hawk-gt-bros-discussions/mechanical-and-technical/member-build-threads/989774-finally-the-actual-hawkati-build-gets-going Hawkati on the Hawk GT Forum] has fit an Aprilia Mille (Rotax 990) engine into a Hawk GT frame. [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=35s There is a Youtube video] showing the engine roughly fitted into the Hawk GT frame. [https://www.youtube.com/@jamesserjeant9497 Here is a link] to the entire video series.
	<blockquote>		<blockquote>
	* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])		* The rear, top bolt fits nearly identically. (This corresponds to the upper mounting lug on the NT650 Hawk and XRV750 Africa Twin engines that's missing on the XL600V Transalp. The fitment is shown at [https://www.youtube.com/watch?v=8rfKFHhe8E0#t=58s 0:58 in the video])